JavaScript - Javascript Calculation Won't Calulate!

Hi there! I hope someone can help me figure out the last little bit of this project. I'm building a form that is calulated based on the options selected with a javascript form. This is my first attempt at something like this so I'm a bit lost at the final update.

First to be sure I'm on spot here is the javascript I'm using to update the form - Code:

<script>
function BDWcalc ()
  {
    var listeners = document.getElementById('listeners').value;
    var bitrate = document.getElementById('bitrate').value;
    var hours = document.getElementById('hours').value;
    var days = document.getElementById('days').value;
    var total = document.getElementById('BDWTotal');
    
    var sum = days*hours*3600*bitrate/8*listeners/1024/1024;
    total.value = sum.toFixed(2)+" GB";
  }
</script>

I'm calling the script in the header of the site with the following line of code
Code:

<script type="text/javascript" language="JavaScript" src='javascript/BDWcalc.js'></script>

Now here is the form where I get stuck. It the last field which is to be updated when the option values are changed. For my purposes here, I've merely created a correct value as a default based on the items selected, but it is not actually being calculated by the script. I need the correct syntax there to get this all to work. Sure hope someone can help -

Form
Code:

<table width="530" border="0" cellspacing="0" cellpadding="5">
  <tr>
    <th scope="col">Listeners</th>
    <th scope="col">Bitrate(quality)</th>
    <th scope="col">Hours per day </th>
    <th scope="col">Days per month </th>
    <th scope="col">Total per month </th>
    <th scope="col">Action</th>
  </tr>
  <tr>
    <th scope="col"><span class="cell" style="width: 75px;">
      <input name="text" type="text" id="listeners" style="margin: 4px 2px 0pt; width: 65px;" onchange="BDWcalc();" value="10" size="20" />
    </span></th>
    <th scope="col"><span class="cell_v">
    <select name="select2" class="BDWbox" id="select" onchange="BDWcalc();">
      <option value="24">24 kbps</option>
      <option value="32">32 kbps</option>
      <option value="48">48 kbps</option>
      <option value="56">56 kbps</option>
      <option value="64" selected="selected">64 kbps</option>
      <option value="80">80 kbps</option>
      <option value="96">96 kbps</option>
      <option value="112">112 kbps</option>
      <option value="128">128 kbps</option>
      <option value="160">160 kbps</option>
      <option value="192">192 kbps</option>
      <option value="224">224 kbps</option>
      <option value="256">256 kbps</option>
      <option value="320">320 kbps</option>
      <option value="512">512 kbps</option>
      <option value="768">768 kbps</option>
      <option value="1536">1.5 mbps</option>
    </select>
    </span></th>
    <th scope="col"><span class="cell_v">
    <select name="select3" class="BDWbox" id="select2" onchange="BDWcalc();">
      <option value="1">1 hour</option>
      <option value="2">2 hours</option>
      <option value="3">3 hours</option>
      <option value="4">4 hours</option>
      <option value="5">5 hours</option>
      <option value="6">6 hours</option>
      <option value="7">7 hours</option>
      <option value="8">8 hours</option>
      <option value="9">9 hours</option>
      <option value="10" selected="selected">10 hours</option>
      <option value="11">11 hours</option>
      <option value="12">12 hours</option>
      <option value="13">13 hours</option>
      <option value="14">14 hours</option>
      <option value="15">15 hours</option>
      <option value="16">16 hours</option>
      <option value="17">17 hours</option>
      <option value="18">18 hours</option>
      <option value="19">19 hours</option>
      <option value="20">20 hours</option>
      <option value="21">21 hours</option>
      <option value="22">22 hours</option>
      <option value="23">23 hours</option>
      <option value="24">24 hours</option>
    </select>
    </span></th>
    <th scope="col"><span class="cell_v">
    <select name="select4" class="BDWbox" id="select3" onchange="BDWcalc();">
      <option value="1">1 day</option>
      <option value="2">2 days</option>
      <option value="3">3 days</option>
      <option value="4">4 days</option>
      <option value="5">5 days</option>
      <option value="6">6 days</option>
      <option value="7">7 days</option>
      <option value="8">8 days</option>
      <option value="9">9 days</option>
      <option value="10">10 days</option>
      <option value="11">11 days</option>
      <option value="12">12 days</option>
      <option value="13">13 days</option>
      <option value="14">14 days</option>
      <option value="15" selected="selected">15 days</option>
      <option value="16">16 days</option>
      <option value="17">17 days</option>
      <option value="18">18 days</option>
      <option value="19">19 days</option>
      <option value="20">20 days</option>
      <option value="21">21 days</option>
      <option value="22">22 days</option>
      <option value="23">23 days</option>
      <option value="24">24 days</option>
      <option value="25">25 days</option>
      <option value="26">26 days</option>
      <option value="27">27 days</option>
      <option value="28">28 days</option>
      <option value="29">29 days</option>
      <option value="30">30 days</option>
    </select>
    </span></th>
     <th scope="col"><span class="cell_v" style="width: 160px;">
    <input name="text2" type="text" id="text2" style="margin: 4px 2px 0pt; width: 90px;" value="41.19 GB" size="20" />
    </span></th>
    <th scope="col"><a href='javascript:BDWcalc();'>Update</a></th>
  </tr>
</table>

The form can be view here

Thank you in advance for any help offered. I've search and found things that are similiar, but none that are exactly what I need here.

Ruth

I've designed a snippet of javascript to receive numbers, add them together, and then display the total. What i'd like to do now is display the amount of numbers added together "count", and then average them all together. Problem is, the count just won't display, so i'm uncertain if I have a logic error in my code or just an html issue? I'd really appreciate the help!

Code:

<html>
<head>
<script type="text/javascript">
var count = 0;
var total = 0;
var number = 0;

function AverageNumbers(form)
{
    number = document.getElementById('num1').value;
    count++;
    total = parseInt(number) + parseInt(total);
    average = parseInt(number) + parseInt(count)
if (number!=null && number!="")
  {
 document.getElementById('total').innerHTML = total;
 document.getElementById('count').innerHTML = count;
  }
  return count;
  return total;
}
</script>
</head>

<body>
    <form>
<INPUT TYPE="number" NAME="inputbox" ID="num1">
<INPUT TYPE="button" NAME="button" Value="Click" onClick="AverageNumbers(this.form)">
</form>
    <div id="total"><div>
            <br>       </br>        
    <div id="count"><div>
    
   

</body>
</html>

Hello,

I am trying to make a page with a target heart rate calculator that displays the heart rate in a text box. This code displays on a new page instead of in the box even though I put an input box, plus it doesn't display the correct value. I think the problem is in the function itself:

Code:

<script>

function calcHeartRate()

{

var age = ""
var heartRate = 220 - age
var minRate = heartRate * .5
var maxRate = heartRate * .85

rate = document.write(heartRate)
document.myForm.yourRate.value = rate
}

At any rate, here is the form also:

Code:

<form name = "myForm">

Age:</br>

<input type = "text" name = "age" /><br/><br/>

<input type = "button" value = "Calculate Your Maximum Heart Rate:"

onclick= "calcHeartRate()"/>

<br/><br/>
Max Heart Rate:<br/>
<input type = "text" name = "yourRate" /><br/><br/>


</form>

I'm sure this is jacked up code since I have definitely been struggling. If you want me to post my entire code, I will, but it is my understanding that it is against the guidelines. Posting a working code is definitely not necessary. Please give me an idea as to what is wrong and I will go from there. I do not want the actual answer. I kind of think the problem is with my age variable but I am not sure what it is.

Thanks!

I have a javascript that should convert any date into a number between 1 and 260. Based on the outcome of that calculation, a viewer is directed to a specific web page.

How can I verify the calculation? How can I see what number javascript is arriving at so I can backtrack to the error? It is not serving up the correct page.

I have compared the results to a calculator on another website that uses a different script to calculate the same result -- that's why I am saying the end results are not correct.

On the other website, scroll down to where you enter a date. It returns a name just above the date (example: July 25, 1970 returns Electric Star). The script I included above returns Yellow Sun. July 25, 1970 should = 68.

Code:

function calculate() {
    if(!isValidDate())
        return;

    var result = 0;
    var cuttingAge = 260;
    var yearBox = document.getElementById("year");
    var year = yearBox.value;
    var month = document.getElementById("month").value;
    var day = document.getElementById("day").value;

    //Rule # 1
    if(month==1 || month==2){
        var selectedYearIndex;
        for(var i=0; i<yearBox.options.length; i++){
            if(yearBox.options[i].selected){
                selectedYearIndex = i;
                break;
            }
        }
        year = yearBox.options[selectedYearIndex-1].value;
    }

    //Rule # 2
    var monthLength = new Array();
    monthLength[0]=0;
    monthLength[1]=31;
    monthLength[2]=29;
    monthLength[3]=31;
    monthLength[4]=30;
    monthLength[5]=31;
    monthLength[6]=30;
    monthLength[7]=31;
    monthLength[8]=31;
    monthLength[9]=30;
    monthLength[10]=31;
    monthLength[11]=30;
    monthLength[12]=31;
    monthLength[13]=31;
    monthLength[14]=29;

    var dayPassed = 0;
    var tempMonth = month;
    if(month<3) //If its january or february
        tempMonth = parseInt(tempMonth) +12; //Add previous year's days
    for(var i=3; i<tempMonth; i++){
        dayPassed += monthLength[i];
    }
    dayPassed += parseInt(day) -1;
    dayPassed = dayPassed%cuttingAge;

    //Rule # 3
    result = parseInt(year) + parseInt(dayPassed);

    //Rule # 4
    if(result > cuttingAge)
        result -= cuttingAge;

    //Rule # 5
    var pendant = new Array();
    var abc = new Array();
    pendant[0] = {
        name:"imix",
        values:new Array(1, 21, 41, 61, 81, 101, 121, 141, 161, 181, 201, 221, 241)
    };
    pendant[1] = {
        name:"ik",
        values:new Array(2, 22, 42, 62, 82, 102, 122, 142, 162, 182, 202, 222, 242)
    };
    pendant[2] = {
        name:"akbal",
        values:new Array(3, 23, 43, 63, 83, 103, 123, 143, 163, 183, 203, 223, 243)
    };
    pendant[3] = {
        name:"kan",
        values:new Array(4, 24, 44, 64, 84, 104, 124, 144, 164, 184, 204, 224, 244)
    };
    pendant[4] = {
        name:"chicchan",
        values:new Array(5, 25, 45, 65, 85, 105, 125, 145, 165, 185, 205, 225, 245)
    };
    pendant[5] = {
        name:"cimi",
        values:new Array(6, 26, 46, 66, 86, 106, 126, 146, 166, 186, 206, 226, 246)
    };
    pendant[6] = {
        name:"manik",
        values:new Array(7, 27, 47, 67, 87, 107, 127, 147, 167, 187, 207, 227, 247)
    };
    pendant[7] = {
        name:"lamat",
        values:new Array(8, 28, 48, 68, 88, 108, 128, 148, 168, 188, 208, 228, 248)
    };
    pendant[8] = {
        name:"muluk",
        values:new Array(9, 29, 49, 69, 89, 109, 129, 149, 169, 189, 209, 229, 249)
    };
    pendant[9] = {
        name:"oc",
        values:new Array(10, 30, 50, 70, 90, 110, 130, 150, 170, 190, 210, 230, 250)
    };
    pendant[10] = {
        name:"chuen",
        values:new Array(11, 31, 51, 71, 91, 111, 131, 151, 171, 191, 211, 231, 251)
    };
    pendant[11] = {
        name:"eb",
        values:new Array(12, 32, 52, 72, 92, 112, 132, 152, 172, 192, 212, 232, 252)
    };
    pendant[12] = {
        name:"ben",
        values:new Array(13, 33, 53, 73, 93, 113, 133, 153, 173, 193, 213, 233, 253)
    };
    pendant[13] = {
        name:"ix",
        values:new Array(14, 34, 54, 74, 94, 114, 134, 154, 174, 194, 214, 234, 254)
    };
    pendant[14] = {
        name:"men",
        values:new Array(15, 35, 55, 75, 95, 115, 135, 155, 175, 195, 215, 235, 255)
    };
    pendant[15] = {
        name:"cib",
        values:new Array(16, 36, 56, 76, 96, 116, 136, 156, 176, 196, 216, 236, 256)
    };
    pendant[16] = {
        name:"caban",
        values:new Array(17, 37, 57, 77, 97, 117, 137, 157, 177, 197, 217, 237, 257)
    };
    pendant[17] = {
        name:"etznab",
        values:new Array(18, 38, 58, 78, 98, 118, 138, 158, 178, 198, 218, 238, 258)
    };
    pendant[18] = {
        name:"cauac",
        values:new Array(19, 39, 59, 79, 99, 119, 139, 159, 179, 199, 219, 239, 259)
    };
    pendant[19] = {
        name:"ahau",
        values:new Array(20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260)
    };

    var redirecctPages = new Array();
    redirecctPages["chuen"] = "http://store.mayankin.com/blue-monkey/";
    redirecctPages["eb"] = "http://store.mayankin.com/yellow-human/";
    redirecctPages["ben"] = "http://store.mayankin.com/red-skywalker/";
    redirecctPages["ix"] = "http://store.mayankin.com/white-wizard/";
    redirecctPages["men"] = "http://store.mayankin.com/blue-eagle/";
    redirecctPages["cib"] = "http://store.mayankin.com/yellow-warrior/";
    redirecctPages["caban"] = "http://store.mayankin.com/red-earth/";
    redirecctPages["etznab"] = "http://store.mayankin.com/white-mirror/";
    redirecctPages["cauac"] = "http://store.mayankin.com/blue-storm/";
    redirecctPages["ahau"] = "http://store.mayankin.com/yellow-sun/";
    redirecctPages["imix"] = "http://store.mayankin.com/red-dragon/";
    redirecctPages["ik"] = "http://store.mayankin.com/white-wind/";
    redirecctPages["akbal"] = "http://store.mayankin.com/blue-night/";
    redirecctPages["kan"] = "http://store.mayankin.com/yellow-seed/";
    redirecctPages["chicchan"] = "http://store.mayankin.com/red-serpent/";
    redirecctPages["cimi"] = "http://store.mayankin.com/white-world-bridger/";
    redirecctPages["manik"] = "http://store.mayankin.com/blue-hand/";
    redirecctPages["lamat"] = "http://store.mayankin.com/yellow-star/";
    redirecctPages["muluk"] = "http://store.mayankin.com/red-moon/";
    redirecctPages["oc"] = "http://store.mayankin.com/white-dog/";

    var pendantName;
    for(var i =0; i<pendant.length; i++){
        var found = false;
        for(var j=0; j<pendant[i].values.length; j++){
            if(result == pendant[i].values[j]){
                pendantName = pendant[i].name;
                found = true;
                break;
            }
        }
        if(found)
            break;
    }

    document.location = redirecctPages[pendantName];
}

/**
         * Comment
         */
function isValidDate() {
    var year = document.getElementById("year").value;
    var month = document.getElementById("month").value;
    var day = document.getElementById("day").value;
    if(month==2 && day>29){
        alert("Please select a valid date");
        return false
    }
    if((month==4 || month==6 || month==9 || month==11) && day>30){
        alert("Please select a valid date");
        return false
    }

    return true;
}

I've started studying JavaScript recently. The following simple scenario from the Russian textbook cannot be implemented on my PC.
Code:

<HTML>
<HEAD>
<TITLE>Object Math Example</TITLE>

</HEAD>

<BODY>
<h1>Object Math Example</h1>
<p>Насколько случайны числа, полученные генератором случайных чисел? Подсчитаем среднее 5000 случайных чисел.</p>

<SCRIPT LANGUAGE="JavaScript">
total = 0;
for (i = 0; i<5000; i++)  {

        num = Math.random();
        total += num;
        document.status = "Generated " + i + " numbers";
      }

average = total / 5000;
average = Math.round(average * 1000 / 1000);
document.write("<h2>" arithmetic mean of random numbers  + average + "</h2>");

</SCRIPT>

</BODY>
</HTML>

I just typed the script char by char. I use Firefox browser, v.3.5.7. The error console does not display any mistakes.
Please, explain me what is wrong in the code.

Hi,

I'm trying to make a calculator app; with a few differences.

I have a text field with a numberpad below it, I got the numbers to show up in the text field, but am unsure as to how when I hit the enter button - it would store them in a variable?...I am also wondering as to how it would store current value and then allow me to input another value(maybe on the next page) and either subtract or add to it(the first value that is stored).

I am also wondering how to get a decimal point in place(need it for currency).

Any help would be greatly appreciated!


Here is my code:

Code:

<html>
<head>
<script type = "text/javascript">
function decPoint(str){
if (str.indexOf('.') == -1) str += ".";
var decNum = str.substring(str.indexOf('.')+1, str.length);
if (decNum.length > 2)
{
alert("Invalid more than 2 digits after decimal")
}
else {
alert("Valid no")
}
}

var ent = document.write(document.getElementById("curamt").value);


</script>
</head>

<body border = "1"; color = "blue";>
<div id = "cur">
<p>amount is: <script>document.getElementById("amount").innerHTML = ent);</script>
</p>


<b>Please type in price of item:</b>
<form name = "calculator">
<table border = "1"; color = "blue";>
<tr>
   <td colspan = "3" width="75%" align = "center">
      <input type = "tel" id = "curamt" name = "tinput" maxlength="4" size="6">
   </td>
</tr>

     <table>
      <tr>

       <td><input type = "button" name = "one" value = " 1 " onclick = "calculator.tinput.value += '1'"></td>
       <td><input type = "button" name = "two" value = " 2 " onclick = "calculator.tinput.value += '2'"></td>
       <td><input type = "button" name = "three" value = " 3 " onclick = "calculator.tinput.value += '3'"></td>
      </tr>  
      <tr>
       <td><input type = "button" name = "four" value = " 4 " onclick = "calculator.tinput.value += '4'"></td>
       <td><input type = "button" name = "five" value = " 5 " onclick = "calculator.tinput.value += '5'"></td>
       <td><input type = "button" name = "six" value = " 6 " onclick = "calculator.tinput.value += '6'"></td>
      </tr>
      <tr>
       <td><input type = "button" name = "seven" value = " 7 " onclick = "calculator.tinput.value += '7'"></td>
       <td><input type = "button" name = "eight" value = " 8 " onclick = "calculator.tinput.value += '8'"></td>
       <td><input type = "button" name = "nine" value = " 9 " onclick = "calculator.tinput.value += '9'"></td>
      </tr>
      <tr>
       <td><input type = "reset" name = "clear" value = " c " onclick = "calculator.tinput.value = ''"></td>
       <td><input type = "button" name = "zero" value = " 0 " onclick = "calculator.tinput.value += '0'"></td>
       <td><input type = "submit" id = "amount" name = "enter" value = " e " onsubmit = "ent(); return false;"></td>
      </tr>
 </table>
 
 </table>
   </form>    
     </div>  
     </body>  
 
</html>

I need help with a javascript calculation. I am a noobie developer as you will probably see by my script but here are my goals:

I already have a working bmi calculator for my website where visitor will enter height and current weight to calculate their current bmi. then I want to have a reverse bmi calculator to grab the same height and weight from said bmi calculator to give a calculation with a fillable goal bmi (example: 18-24 "healthy bmi") to read out a goal weight for them to achieve.

I have already figured out the first part of the bmi calculation now i just need the second calculation to grab the height and weight from original bmi calculator without needing to be filled in again and compute result in a second table. I will post code that I have come up with so far for the whole page. Thank you in advance for your help!


[CODE]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>

<head>

<title>
HCG Drops Fat Lose 1-2 pounds Per Day!
</title>




<style type="text/css">






#wrapall {
width:1000px;
align:center;
margin-left: 7em;
margin-right: 7em;
}

#navigationbar{



}

#bmibar {
width:973px;
background-image:url(bmibar2.jpg);
background-repeat:no-repeat;
background-position:left bottom;
padding-bottom:16em;
margin:4px;
}
#Hcgborder {
width:973px;
background-image:url(index_15.jpg);
background-repeat:no-repeat;
background-position:left bottom;
padding-bottom:17em;
}

#Hcgborder h3 {
width:973px;
background-image:url(index_12.jpg);
background-repeat:no-repeat;
background-position:left top;
margin:0px;
padding-left:4em;
padding-top:8em;
}

p {
background-image:url(index_13.jpg);
background-repeat:repeat-y;
background-position:left center;
margin:0px;
padding-left:4em;
padding-right:4em;
font:family"arial"
}

#bmiscale{
font-size:14px;
padding-left:15px;

}

#Hcgborder2 {
width:973px;
background-image:url(index_19.jpg);
background-repeat:no-repeat;
background-position:left bottom;
padding-bottom:0.5em;
}

#dhtmlgoodies_bmi_calculator{
width:180px; /* Width of entire calculator */
height:145px; /* Height of entire calculator */
font-family: Trebuchet MS, Lucida Sans Unicode, Arial, sans-serif; /* Fonts to use */
}
#dhtmlgoodies_bmi_calculator .calculator_form{ /* Form */
width:180px; /* Width of form div */
float:left; /* Position the form at the left of the graph */
padding-left:5px;
padding-right:5px;
}
#dhtmlgoodies_bmi_calculator input{
width:130px;
}
#dhtmlgoodies_bmi_calculator .calculator_form .textInput{
width:40px; /* Width of small text inputs */
text-align:right; /* Right align input text */
}



.barContainer{ /* DIV for both the multicolor bar and users weight bar */
position:absolute;
bottom:0px;
border:0px solid #4ff;
border-bottom:0px;
text-align:center;
vertical-align:middle;
}
.barContainer div{ /* colored div inside "barContainer */
border-bottom:1px solid #000;
}
.barContainer .labelSpan{ /* Label indicating users BMI */
background-color:#FFF; /* White BG */
border:1px solid #000; /* Black border */
padding:1px; /* "Air" inside the box */
font-size:0.9em; /* Font size */
}

.clear{ /* Clearing div - you shouldn't do anything with this one */
clear:both;
}

</style>
<script type="text/javascript">


var useCm = false; // Using centimetre for height, false = inch
var useKg = false // Using kilos for weight, false = pounds
var graphColors = ['#00baff','#02eb07','#ffb400','#ff0000'];
var graphLabels = [''];
var labelsPerRow = 1; /* Help labels above graph */
var barHeight = 50; // Total height of bar
var barWidth = 50; // Width of bars */

// Don't change anything below this point */

var calculatorObj;
var calculatorGraphObj;
var bmiArray = [0,18.5,25,30,60]; /* BMI VALUES */
var weightDiv = false;

function calculateBMI()
{
var height = document.bmi_calculator.bmi_height.value;
var weight = document.bmi_calculator.bmi_weight.value;
height = height.replace(',','.');
weight = weight.replace(',','.');
if(!useKg)weight = weight / 2.2;
if(!useCm)height = height * 2.54;

if(isNaN(height))return;
if(isNaN(weight))return;

height = height / 100;
var bmi = weight / (height*height);
createWeightBar(bmi);
}

function createWeightBar(inputValue){

if(!weightDiv){
self.status = Math.random();
weightDiv = document.createElement('DIV');
weightDiv.style.width = barWidth + 'px';
weightDiv.className='barContainer';
weightDiv.style.left = Math.round((calculatorGraphObj.offsetWidth/2) + ((calculatorGraphObj.offsetWidth/2) /2) - (barWidth/2)) + 'px';
calculatorGraphObj.appendChild(weightDiv);
var span = document.createElement('SPAN');
weightDiv.appendChild(span);

var innerSpan = document.createElement('SPAN');
innerSpan.className='labelSpan';
span.appendChild(innerSpan);
}else{
span = weightDiv.getElementsByTagName('SPAN')[0];
innerSpan = weightDiv.getElementsByTagName('SPAN')[1];
}
var color = graphColors[graphColors.length-1];
for(var no = bmiArray.length-1;no>0;no--){
if(bmiArray[no]>inputValue)weightDiv.style.backgroundColor = graphColors[no-1];
}
if(inputValue/1>1){
innerSpan.innerHTML = inputValue.toFixed(2);
span.style.display='inline';
}else span.style.display='none';
var height = Math.min(Math.round(barHeight * (inputValue / bmiArray[bmiArray.length-1])),barHeight-10);
span.style.lineHeight = Math.round(height) + 'px';
weightDiv.style.height = height + 'px';

}


function validateField()
{
this.value = this.value.replace(/[^0-9,\.]/g,'');

}

function initBmiCalculator()
{
calculatorObj = document.getElementById('dhtmlgoodies_bmi_calculator');
calculatorGraphObj = document.getElementById('bmi_calculator_graph');
if(!useCm)document.getElementById('bmi_label_height').innerHTML = 'inches';
if(!useKg)document.getElementById('bmi_label_weight').innerHTML = 'pounds';

var heightInput = document.getElementById('bmi_height');
heightInput.onblur = validateField;
var widthInput = document.getElementById('bmi_height');
widthInput.onblur = validateField;

var labelDiv = document.createElement('DIV');
labelDiv.className = 'graphLabels';
calculatorGraphObj.appendChild(labelDiv);
for(var no=graphLabels.length-1;no>=0;no--){
var colorDiv = document.createElement('DIV');
colorDiv.className='square';
colorDiv.style.backgroundColor = graphColors[no];
colorDiv.innerHTML = '<span></span>';
labelDiv.appendChild(colorDiv);

var labelDivTxt = document.createElement('DIV');
labelDivTxt.innerHTML = graphLabels[no];
labelDiv.appendChild(labelDivTxt);
labelDivTxt.className='label';

if((no+1)%labelsPerRow==0){
var clearDiv = document.createElement('DIV');
clearDiv.className='clear';
labelDiv.appendChild(clearDiv);
}
}
var clearDiv = document.createElement('DIV');
clearDiv.className='clear';
labelDiv.appendChild(clearDiv);

var graphDiv = document.createElement('DIV');
graphDiv.className='barContainer';
graphDiv.style.width = barWidth + 'px';
graphDiv.style.left = Math.round(((calculatorGraphObj.offsetWidth/2) /2) - (barWidth/2)) + 'px';
graphDiv.style.height = barHeight;
calculatorGraphObj.appendChild(graphDiv);

var totalHeight = 0;
for(var no=bmiArray.length-1;no>0;no--){
var aDiv = document.createElement('DIV');
aDiv.style.backgroundColor = graphColors[no-1];
aDiv.innerHTML = '<span></span>';
var height = Math.round(barHeight * (bmiArray[no] - bmiArray[no-1]) / bmiArray[bmiArray.length-1]) - 1;
aDiv.style.height = height + 'px';
graphDiv.appendChild(aDiv);

}

createWeightBar(1);
}

</script>





<!--
function cal_bmi(lbs, ins){
h2 = ins * ins;
bmi = lbs * h2/703
wtl = h2/703 * 24.9
f_bmi = Math.floor(bmi);
diff = bmi - f_bmi;
diff = diff * 10;
diff = Math.round(diff);
if (diff == 10){
f_bmi += 1;
diff = 0;
}
bmi = f_bmi + "." + diff;
return bmi;
}
function compute(){
var f = self.document.forms[0];

w = f.wt.value;
v = f.htf.value;
u = f.hti.value;

// Format values for the calculation

if (!chkw(u)){
var ii = 0;
f.hti.value = 0;
} else {
var ii = parseInt(f.hti.value);
}

var fi = parseInt(f.htf.value * 12);
var i = fi + ii;

// Do validation of remaining fields

if (!chkw(v)){
alert("Please enter your height.");
f.htf.focus();
return;
}
if (!chkw(w)){
alert("Please enter your weight.");
f.wt.focus();
return;
}

// Perform calculation

f.bmi.value = cal_bmi(w, i);
f.bmi.focus();
}

function chkw(w){
if (isNaN(parseInt(w))){
return false;
} else if (w < 0){
return false;
}
else{
return true;
}
}
// -->









</style>

</head>


<body>

<div id="wrapall" align="center">

<img src="index_01_01.jpg" alt="Hcg drops fat banner">
<br/>
<div id="navigationbar">
<a href="http://www.hcgdropsfat.com"><img src=hcghomeog.jpg border=0></a>
<img src="hcgblogo.jpg" alt="Hcg blog"/>
<img src="hcgfaqo.jpg" alt="Hcg faq">
<img src="hcgresourceso.jpg" alt="Hcg resources">
<img src="hcgtestimonialso.jpg" alt="Hcg testimonials">
<img src="hcgsupporto.jpg" alt="Hcg support">
<img src="hcgordero.jpg" alt="Hcg order">


<div id="bmibar">
<div style="position: absolute; top: 515px; left: 170px"; style="font-family: arial"; align="left";>
How much is your weight in <br/>relation to your height

<br/>



<!--BMI CALCULATOR SCRIPT-->


<div id="dhtmlgoodies_bmi_calculator">
<div class="calculator_form">
<form name="bmi_calculator">
<table>
<tr>
<td><label for="bmi_height">Height</label>:</td><td><input class="textInput" type="text" id="bmi_height" name="bmi_height"> <span id="bmi_label_height">cm</span></td>
</tr>
<tr>
<td><label for="bmi_weight">Weight</label>:</td><td><input class="textInput" type="text" id="bmi_weight" name="bmi_weight"> <span id="bmi_label_weight">kg</span></td>
</tr>
<tr>
<td colspan="2"><input type="button" onclick="calculateBMI()" value="Find BMI"></td>
</tr>
</table>
</form>
</div>
<div class="calculator_graph" id="bmi_calculator_graph">
</div>
</div>
<script type="text/javascript">
initBmiCalculator();
</script>




</div>



<div style="position: absolute; top: 515px; left: 405px"; style="font-family: arial"; align="left";>
What is your BMI category? <br/>This will help determine <br/>how much you need to lose
<br/><br/><div id="bmiscale">Underweight = Under 18.5
<br/>Normal weight = 18.5 – 24.9
<br/>Overweight = 25 – 29.9
<br/>Obesity = 30 or more
<br/><br/>
</div></div>

<div style="position: absolute; top: 515px; left: 640px"; style="font-family: arial"; align="left";>
Calculate approximately how <br/>much weight you should lose<br/> to be at a healthy BMI




<!--REVERSE BMI CALCULATOR-->


<td width="81%" valign="top">
<br/><div align="center" class="page_header">Reverse BMI Calculator</div><br/>
<div align="center" class="main_text"></div>
<form action="" method="post" name="BMI_input" class="main_text" id="BMI_input">

<div style="text-align: center;"><font face="Arial, Helvetica, sans-serif">Target BMI:<b>
<input id="FormsEditField4" type="text" name="wt" value="24" size="3" maxlength="2" />
<br />
</b></font></div>
<div style="text-align: center;"> <font face="Arial, Helvetica, sans-serif">
<input type="button" name="FormsButton1" value="Find Target Weight" id="FormsButton1" onclick="self.compute()" />
</font></div>
<div style="text-align: center;"><font face="Arial, Helvetica, sans-serif">This
is your Target Weight: <br />
<input id="FormsEditField5" type="text" name="bmi" value="" size="4" maxlength="5" />
&nbsp; </font></div>


</div>


</div>

<div id="Hcgborder">

<h3></h3>

<p align="left"><b>

WHAT IS HCG?

</b><BR/><BR/>In simple terms: its a hormone protein produced by pregnant women that when used as a homeopathic dietary supplement, will assist in a revolutionary cure to the traditional diet routine.

<BR/><BR/><b>HCG is so unique from other diets in 3 major ways:

</b>

<br/><BR/><img src="muscletissue.jpg" alt="practice"style="float:right;" width="250px" height="250px"/>
1. USES HIGHEST FAT AS PRIMARY FUEL SOURCE FOR THE BODY - it begins to break down the abnormally high body fat as the primary fuel source (BURNS ALOT OF FAT!)


<BR/>2. DOESNT EAT AT VITAL MUSCLE TISSUE - it will preserve and maintain lean body muscle (without HCG THE BODY WOULD DEPLETE VITAL MUSCLE TISSUE ON A LOW CALORIE DIET. Also if you burn muscle you also lose metabolism for each pound of muscle you lose you also lose 50 calories of metabolism)


<BR/>3. WHILE MOST DIETS SLOW METABOLISM HCG ACTUALLY MAINTAINS IT EVEN AFTER THE DIET - because hcg maintains lean muscle and maintains metabolism, you keep your metabolism in check long after the diet program so you reset your bodys roaming weight.
<BR/><BR/>THE HOMEOPATHIC DROPS YOU WILL FIND ON OUR SITE ARE ALL NATURAL

<br/><BR/><b>HOW LONG HAS IT BEEN AROUND?</b>
<BR/><BR/>HCG or (Human chorionic gonadotropin)<img src="nicefigure.jpg" alt="Hcg stored fat" style="float:right;" width="250px" height="250px"/> is a protein hormone </div><!--p1-->



</div><!--Hcgborder-->

<div id="Hcgborder2">
<p><b>hello</b></p>

<p>Hello again</p>
</div><!--Hcgborder2-->

</div>
</div><!--wrapall-->
</body>


</html>

[CODE]

The problem that I am facing is my total amount comes out to $102.46 through my calculations on the page. But when it is moved over to PayPal, the value becomes $102.44. I have many more amount that are also either up .2 cents or down .2 cents. I managed to track this down as a rounding issue. Anytime I do the math, it rounds the amount off and gives the total. But since quantity is involved which is done through PayPal, I had to divide my total by the quantity to bring it back to its original amount thus allowing PayPal to multiply the amount by the quantity.

I've pulled my hair out on this one. Ay help would be appreciated.

Thank you

Code:

<html>
<head>
<title>TESTING</title>
<script src="SpryAssets/SpryValidationSelect.js" type="text/javascript"></script>
<script src="SpryAssets/SpryValidationCheckbox.js" type="text/javascript"></script>
<script src="SpryAssets/SpryValidationTextField.js" type="text/javascript"></script>
<link href="SpryAssets/SpryValidationSelect.css" rel="stylesheet" type="text/css">
<link href="SpryAssets/SpryValidationCheckbox.css" rel="stylesheet" type="text/css">
<link href="SpryAssets/SpryValidationTextField.css" rel="stylesheet" type="text/css">
</head>

<td width="95%" align="center" class="TextoImageSpace"><table border="0" cellpadding="0" cellspacing="0" class="TextoImageSpace_center">
    <tr>
      <td align="center"><h2>Pricing</h2>
        <form action="https://www.paypal.com/cgi-bin/webscr" method="post" name="price" id="price">
          <p>Select amount please.</p>
          <p>
            <input type="hidden" name="cmd" value="_xclick" />
            State: <br />
            <span id="spryselect1">
            <!-- selects the state // onclick changes the variables specified values -->
            <select name="combo0" id="combo_0" onclick="roundNumber(amount2.value, 2);roundNumberTax(tax.value, 2);roundNumberProduct(product.value, 2);roundNumberShipping(shipping.value, 2);roundNumberAmount(amount2.value, 2)" style="width:200px;">
              <option selected="selected"> </option>
              <option value="70">Arizona</option>
            </select>
            <span class="selectRequiredMsg"></span></span><br />
            Quantity: <br />
            <span id="spryselect2">
            <!-- selects the quantity // onclick changes the variables specified values -->
            <select name="combo1" id="combo_1" onclick="roundNumber(amount2.value, 2);roundNumberTax(tax.value, 2);roundNumberProduct(product.value, 2);roundNumberShipping(shipping.value, 2);roundNumberAmount(amount2.value, 2)" style="width:200px;">
              <option selected="selected"> </option>
              <option value="4">4 - $20.95</option>
            </select>
            <span class="selectRequiredMsg"></span></span><br />
            Product: <br />
            <span id="sprytextfield11">
            <label>
            <input type="text" name="product" id="txt_product" disabled="disabled" value="" style="width:200px;" />
            </label>
            </span><br />
            Shipping: <br />
            <span id="sprytextfield9">
            <label>
            <input type="text" name="shipping" id="txt_shipping" disabled="disabled" value="" style="width:200px;" />
            </label>
            </span><br />
            Taxes: <br />
            <span id="sprytextfield10">
            <label>
            <input type="text" name="tax" id="txt_tax" disabled="disabled" value="" style="width:200px;" />
            </label>
            </span><br />
            Total: <span id="sprytextfield8">
            <input type="hidden" name="amount" id="txt_price" value="" style="width:200px;" />
            </span>
            <input type="hidden" name="amount3" id="txt_price3" value="" style="width:200px;" />
            <br />
            <span id="sprytextfield7">
            <input type="text" name="amount2" id="txt_price2" disabled="disabled" value="" style="width:200px;" />
            </span></p>
          <hr width="100%" />
          <p>Please fill in details.</p>
          <p>
            <input type="hidden" name="item_name" value="TEST ITEM" />
            <input type="hidden" name="button_subtype" value="products" />
            <input type="hidden" name="rm" value="1" />
            <input type="hidden" name="return" value="http://www.example.com/" />
            <input type="hidden" name="cancel_return" value="http://www.example.com/" />
            <input type="hidden" name="currency_code" value="USD" />
            <input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynowCC_LG.gif:NonHosted" />
            <input type="hidden" name="address_override" value="1" />
            <input type="hidden" name="shipping" value="0" />
            <input type="hidden" name="business" value="wayne@lifelikemedia.ca" />
            <input type="hidden" name="quantity" id="quantity" value="1" />
            <input type="hidden" name="state" id="state" value="" />
            First Name: <br />
            <span id="sprytextfield1">
            <input type="text" name="first_name" value="TEST" style="width:200px;" />
            <span class="textfieldRequiredMsg"></span></span><br />
            Last Name: <br />
            <span id="sprytextfield2">
            <input type="text" name="last_name" value="TEST" style="width:200px;" />
            </span> <br />
            Address: <br />
            <span id="sprytextfield3">
            <input type="text" name="address1" value="1234 TEST STREET" style="width:200px;" />
            <span class="textfieldRequiredMsg"></span></span><br />
            City: <br />
            <span id="sprytextfield4">
            <input name="city" type="text" value="Scottsdale" style="width:200px;" />
            <span class="textfieldRequiredMsg"></span></span><br />
            ZIP Code: <br />
            <span id="sprytextfield5">
            <input type="text" name="zip" value="85260" style="width:200px;" />
            </span><br />
            Country: <br />
            <span id="sprytextfield6">
            <input name="country" type="text" disabled="disabled" value="US" style="width:200px;" />
            </span><br />
            <br />
            <span id="sprycheckbox1">
            <label>
            <input type="checkbox" name="replacePolicy" id="replacePolicy" />
            </label>
            <span class="checkboxRequiredMsg">Please read policy.</span></span> <a href="#" class="style10" onClick="window.open('replace.html','popup','width=400,height=300,scrollbars=yes,resizable=yes,toolbar=no,directories=no,location=no,menubar=no,status=no,left=50,top=0'); return false">Please read policy.</a><br />
            <br />
            <input type="image" name="submit" border="0"
src="http://www.thinkanddone.com/finance/buynow.jpg" 
alt="PayPal - The safer, easier way to pay online" />
          </p>
        </form></td>
    </tr>
  </table>
  <script type="text/javascript">

	var shipping = document.getElementById("txt_shipping").value;
	var tax = document.getElementById("txt_tax").value;
	var product = document.getElementById("txt_product").value;

// rounds total amount off
function roundNumber(rnum, rlength) { // Arguments: number to round, number of decimal places
var v1 = document.getElementById("combo_1").value, v2 = document.getElementById("combo_0").value;
  var newnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
  var newnumber2 = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
  document.price.amount2.value = newnumber.toFixed(2); // Output the result to the form field
  document.price.amount.value = (newnumber2 / v1).toFixed(2);
}

// rounds tax off
function roundNumberTax(rnum, rlength) { // Arguments: number to round, number of decimal places
  var taxnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
  document.price.tax.value = taxnumber.toFixed(2); // Output the result to the form field
}

// rounds product off
function roundNumberProduct(rnum, rlength) { // Arguments: number to round, number of decimal places
  var productnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
  document.price.product.value = productnumber.toFixed(2); // Output the result to the form field
}

// rounds shipping off
function roundNumberShipping(rnum, rlength) { // Arguments: number to round, number of decimal places
  var shippingnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
  document.price.shipping.value = shippingnumber.toFixed(2); // Output the result to the form field
}

// rounds paypal amount off
function roundNumberAmount(rnum, rlength) { // Arguments: number to round, number of decimal places
  var amountnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
  document.price.amount2.value = amountnumber.toFixed(2); // Output the result to the form field
}

window.onload = function() {

    var dropChange = function() {

		// Declaring variables
        var v1 = document.getElementById("combo_1").value, v2 = document.getElementById("combo_0").value;
		var amount3 = document.getElementById("txt_price3").value, amount = document.getElementById("txt_price").value;
		
		document.getElementById("txt_price3").value = (amount);
		
		document.getElementById("quantity").value = (v1);

        if (v2 == 70) {

            document.getElementById("state").value = ("AZ");

            }
		
		<!-- when state is selected, these calculations are done -->
		if (v2 == 70) {
			if (v1 == 4) {
				document.getElementById("txt_price2").value = v1 * 20.95;
				document.getElementById("txt_product").value = document.getElementById("txt_price2").value;
				document.getElementById("txt_price2").value = document.getElementById("txt_product").value * 0.0795;
				document.getElementById("txt_tax").value = document.getElementById("txt_price2").value;
				document.getElementById("txt_price2").value = 12;
				document.getElementById("txt_shipping").value = document.getElementById("txt_price2").value;
				document.getElementById("txt_price2").value = v1 * 20.95 * 1.0795 + 12.00;
			}
		}
    };

	document.getElementById("combo_0").onchange = dropChange;
	
    document.getElementById("combo_1").onchange = dropChange;

}; 
</script>
  <script type="text/javascript">
<!--
var spryselect1 = new Spry.Widget.ValidationSelect("spryselect1", {validateOn:["change"]});
var spryselect2 = new Spry.Widget.ValidationSelect("spryselect2", {validateOn:["change"]});
var sprycheckbox1 = new Spry.Widget.ValidationCheckbox("sprycheckbox1", {validateOn:["change"]});
var sprytextfield6 = new Spry.Widget.ValidationTextField("sprytextfield6", "none");
var sprytextfield5 = new Spry.Widget.ValidationTextField("sprytextfield5", "zip_code", {validateOn:["change"]});
var sprytextfield4 = new Spry.Widget.ValidationTextField("sprytextfield4", "none");
var sprytextfield3 = new Spry.Widget.ValidationTextField("sprytextfield3", "none");
var sprytextfield2 = new Spry.Widget.ValidationTextField("sprytextfield2", "none");
var sprytextfield1 = new Spry.Widget.ValidationTextField("sprytextfield1", "none");
var sprytextfield7 = new Spry.Widget.ValidationTextField("sprytextfield7", "none", {validateOn:["change"]});
var sprytextfield8 = new Spry.Widget.ValidationTextField("sprytextfield8", "currency", {validateOn:["change"]});
var sprytextfield10 = new Spry.Widget.ValidationTextField("sprytextfield10");
var sprytextfield9 = new Spry.Widget.ValidationTextField("sprytextfield9");
var sprytextfield11 = new Spry.Widget.ValidationTextField("sprytextfield11");
//-->
</script>
</body>
</html>

Ok I am looking for a simple bmi calculator that calculates body mass index then in a seperate table calculates what a target weight should be based on the goal bmi. no need for making it look fancy, just functionality for now. thanks!

Can someone PLEASE show me what I am doing wrong with my code here?

Basically, I have a registration form. In this registration form, I have 4 people register. It depends on each person birthyear to determine the amount of fees for each person.

The fees a Registration Fee, Hotel Fee, Meal Fee, Discount

Also, the trick is only first and second persons get Hotel Fee and Discount Fee. Third and Fourth person only pay Registration Fee and Meal Fee.

So when user select birthyear from a dropdown menu for each person, the fees will be automatically filled in the input fields for each person and then do a total calculation.

Each person will have a total of fees and there is another total field to automatically total up all 4 total fields from those 4 people.

So here is my code so far

Javascript
Code:

<script type="text/javascript">
			function doUpdate(year, num)
			{
				if (isNaN(year)) return;
				var regfee = '0';
				var meal = '0';
				var hotel = '0';
//REGISTRATION Price
				if (year >= 2000)
					{
						regfee = '0';
					}
				else if (year < 2000 && year > 1995 )
					{
						regfee = '20';
					}
				else
					{
						regfee = '30';
					}
//MEAL Price
				if (year < 2001)
					{
						meal = '80';
					}
				else if (year >= 2001 && year <= 2009)
					{
						meal = '60';
					}
				else
					{
						meal = '0';
					}
// HOTEL Price
				if(document.getElementById('year1').value!='')
					{
					hotel='199';
					}
				else if (document.getElementById('year2').value!='')
					{
					hotel='199';
					}
				
//DISCOUNT Price
				if (document.getElementById('vip'+num).checked==true)
					{
						if (year > 1993)
						{
						discount = '0';
						}
						else if (year == 1993)
						{
						discount = '0';
						}
						else
						{
						discount = '-20';
						}
					}
					else 
					{
						if (year > 1993)
						{
						discount = '0';
						}
						else if (year == 1993)
						{
						discount = '0';
						}
						else
						{
						discount = '-10';
						}
					
					}
				


				document.getElementById('regfee' + num).value = regfee;
				document.getElementById('meal' + num).value = meal;
				
				if(document.getElementById('year1').value!=''){
				
				document.getElementById('hotel1').value = hotel;
				document.getElementById('discount1').value = discount;

                                //Write to total field for second person
				document.getElementById('total1').value = parseInt(regfee)+parseInt(meal)+parseInt(hotel)+parseInt(discount); 
				}
				if(document.getElementById('year2').value!=''){
				document.getElementById('hotel2').value = hotel;
				document.getElementById('discount2').value = discount;
                                
                               //Write to total field for second person
				document.getElementById('total2').value = parseInt(regfee)+parseInt(meal)+parseInt(hotel)+parseInt(discount); 
				}
				if(document.getElementById('year3').value!='' && document.getElementById('year4').value!=''){
				document.getElementById('hotel3').value == '0';
				document.getElementById('discount3').value == '0';
				document.getElementById('hotel4').value == '0';
				document.getElementById('discount4').value == '0';
                                
                               // Write to total fields for third and fourth person
				document.getElementById('total3').value = parseInt(regfee)+parseInt(meal); 
				document.getElementById('total4').value = parseInt(regfee)+parseInt(meal); 
				}
				
// Write to subtotal field by sum up all 4 total fields				 	
document.getElementById('subtotal1').value = parseInt(document.getElementById('total1').value) + parseInt(document.getElementById('total2').value) + parseInt(document.getElementById('total3').value) + parseInt(document.getElementById('total4').value); 	
		}

		</script>

and here is my form
Code:

<form action="form.html" method="post" class="js_submit" name="form1" id="form1">
<table>
<tr>
<td>VIP</td>
<td>Birthyear</td>
<td>Registration Fee</td>
<td>Hotel Fee</td>
<td>Meal Fee</td>
<td>Discount</td>
<td>Total</td>
</tr>
<!-----------First Persion ------------------->
<tr>
<td><input type="checkbox" name="vip1" id="vip1" value="Y" class="inpt_c"  /></td>
<td><select name="year1" id="year1" onchange='doUpdate(this.value * 1,1);'>
<option selected="selected"></option>
<option value="2011">2011<option>
<option value="2010">2010</option>
<option value="2009">2009</option>
<option value="2008">2008</option>
<option value="2007">2007</option>
<option value="2006">2006</option>
<option value="2005">2005</option>
<option value="2004">2004</option>
<option value="2003">2003</option>
<option value="2002">2002</option>
<option value="2001">2001</option>
<option value="2000">2000</option>
<option value="1999">1999</option>
<option value="1998">1998</option>
<option value="1997">1997</option>
<option value="1996">1996</option>
<option value="1995">1995</option>
<option value="1994">1994</option>
<option value="1993">1993</option>
<option value="1992">1992</option>
<option value="1991">1991</option>
<option value="1990">1990</option>
<option value="1989">1989</option>
<option value="1988">1988</option>
<option value="1987">1987</option>
<option value="1986">1986</option>
<option value="1985">1985</option>
<option value="1984">1984</option>
<option value="1983">1983</option>
<option value="1982">1982</option>
<option value="1981">1981</option>                                                                                                    
</select></td>
<td><input type="text" id="regfee1" name="regfee1" class="inpt_a" value=""/></td>
<td><input type="text" value="" id="hotel1" name="hotel1" class="inpt_a" /></td>
<td><input type="text" value="" id="meal1" name="meal1" class="inpt_a" /></td>
<td><input type="text" value="" id="discount1" name="discount1" class="inpt_a"/></td>
<td><input type="text" value="" id="total1" name="total1" class="inpt_a" /></td>
</tr>
<!------------Second Person ----------------->
<tr>
<td><input type="checkbox" name="vip2" id="vip2" value="Y" class="inpt_c"  /></td>
<td><select name="year2" id="year2" onchange='doUpdate(this.value * 1,2);'>
<option selected="selected"></option>
<option value="2011">2011<option>
<option value="2010">2010</option>
<option value="2009">2009</option>
<option value="2008">2008</option>
<option value="2007">2007</option>
<option value="2006">2006</option>
<option value="2005">2005</option>
<option value="2004">2004</option>
<option value="2003">2003</option>
<option value="2002">2002</option>
<option value="2001">2001</option>
<option value="2000">2000</option>
<option value="1999">1999</option>
<option value="1998">1998</option>
<option value="1997">1997</option>
<option value="1996">1996</option>
<option value="1995">1995</option>
<option value="1994">1994</option>
<option value="1993">1993</option>
<option value="1992">1992</option>
<option value="1991">1991</option>
<option value="1990">1990</option>
<option value="1989">1989</option>
<option value="1988">1988</option>
<option value="1987">1987</option>
<option value="1986">1986</option>
<option value="1985">1985</option>
<option value="1984">1984</option>
<option value="1983">1983</option>
<option value="1982">1982</option>
<option value="1981">1981</option>                                                                                                    
</select></td>
<td><input type="text" id="regfee2" name="regfee2" class="inpt_a" value=""/></td>
<td><input type="text" value="" id="hotel2" name="hotel2" class="inpt_a" /></td>
<td><input type="text" value="" id="meal2" name="meal2" class="inpt_a" /></td>
<td><input type="text" value="" id="discount2" name="discount2" class="inpt_a"/></td>
<td><input type="text" value="" id="total2" name="total2" class="inpt_a" /></td>
</tr>
<!-----------Third Person ------------------->
<tr>
<td><input type="checkbox" name="vip3" id="vip3" value="Y" class="inpt_c"  /></td>
<td><select name="year3" id="year3" onchange='doUpdate(this.value * 1,3);'>
<option selected="selected"></option>
<option value="2011">2011<option>
<option value="2010">2010</option>
<option value="2009">2009</option>
<option value="2008">2008</option>
<option value="2007">2007</option>
<option value="2006">2006</option>
<option value="2005">2005</option>
<option value="2004">2004</option>
<option value="2003">2003</option>
<option value="2002">2002</option>
<option value="2001">2001</option>
<option value="2000">2000</option>
<option value="1999">1999</option>
<option value="1998">1998</option>
<option value="1997">1997</option>
<option value="1996">1996</option>
<option value="1995">1995</option>
<option value="1994">1994</option>
<option value="1993">1993</option>
<option value="1992">1992</option>
<option value="1991">1991</option>
<option value="1990">1990</option>
<option value="1989">1989</option>
<option value="1988">1988</option>
<option value="1987">1987</option>
<option value="1986">1986</option>
<option value="1985">1985</option>
<option value="1984">1984</option>
<option value="1983">1983</option>
<option value="1982">1982</option>
<option value="1981">1981</option>                                                                                                    
</select></td>
<td><input type="text" id="regfee3" name="regfee3" class="inpt_a" value=""/></td>
<td><input type="text" value="" id="hotel3" name="hotel3" class="inpt_a" /></td>
<td><input type="text" value="" id="meal3" name="meal3" class="inpt_a" /></td>
<td><input type="text" value="" id="discount3" name="discount3" class="inpt_a"/></td>
<td><input type="text" value="" id="total3" name="total3" class="inpt_a" /></td>
</tr>
<!----------Fourth Person -------------------->
<tr>
<td><input type="checkbox" name="vip4" id="vip4" value="Y" class="inpt_c"  /></td>
<td><select name="year1" id="year1" onchange='doUpdate(this.value * 1,4);'>
<option selected="selected"></option>
<option value="2011">2011<option>
<option value="2010">2010</option>
<option value="2009">2009</option>
<option value="2008">2008</option>
<option value="2007">2007</option>
<option value="2006">2006</option>
<option value="2005">2005</option>
<option value="2004">2004</option>
<option value="2003">2003</option>
<option value="2002">2002</option>
<option value="2001">2001</option>
<option value="2000">2000</option>
<option value="1999">1999</option>
<option value="1998">1998</option>
<option value="1997">1997</option>
<option value="1996">1996</option>
<option value="1995">1995</option>
<option value="1994">1994</option>
<option value="1993">1993</option>
<option value="1992">1992</option>
<option value="1991">1991</option>
<option value="1990">1990</option>
<option value="1989">1989</option>
<option value="1988">1988</option>
<option value="1987">1987</option>
<option value="1986">1986</option>
<option value="1985">1985</option>
<option value="1984">1984</option>
<option value="1983">1983</option>
<option value="1982">1982</option>
<option value="1981">1981</option>                                                                                                    
</select></td>
<td><input type="text" id="regfee4" name="regfee4" class="inpt_a" value=""/></td>
<td><input type="text" value="" id="hotel4" name="hotel4" class="inpt_a" /></td>
<td><input type="text" value="" id="meal4" name="meal4" class="inpt_a" /></td>
<td><input type="text" value="" id="discount4" name="discount4" class="inpt_a"/></td>
<td><input type="text" value="" id="total4" name="total4" class="inpt_a" /></td>
</tr>
<!------------Subtotal of all 4 totals above ------------>
<tr>
<td colspan="6"> <input name="subtotal1" type="text" id="subtotal1" class="inpt_a" value="" readonly="readonly"  /></td>
</tr>
</form>

Here is my form URL: http://daihoibaptit.org/form.html

Thanks for your help

Hi,

I am using the below code to calculate the age of a child from DOB. Criteria is as of 09/01/2010 (for the school year 2010-11). Even though the script seems to working fine in some cases the age calculations are wrong. Can some please tell what is wrong with the code.

For ex: DOB 12/20/1999 the age should be 10 as if 09/01/2010. However the age is calculated as 11 years.

Code:

Function Row_Inserting(rs)
If Not EW_DEBUG_ENABLED Then On Error Resume Next
DIM ChildAge, fromDate
fromDate=CDate("09/01/2010")
ChildAge = DateDiff("d",rs("DOB"),fromDate)
If ChildAge <= (Cint("1095")) Then
CancelMessage="Your child is too young to attend our classes. Please register after your child has reached pre-K."
Row_Inserting = False
Else
rs("Age")= DateDiff("YYYY",rs("DOB"),Date())
Row_Inserting = True
End If
End Function

Any pointers .. Thanks
Vinny

I am a student trying to complete this assignment. Any assistance you can give me is greatly appreciated. My code is inserted below.

This is calculator program that I have gotten stuck on. Here is where I think I am at:

The program is now taking the 1st number entered displaying it and storing it in the variable "memory".
Operation (+,-,*,/) is added to the memory in function action1()
but then when the second number is entered it replaces memory with the second number. How can I get the variable memory to the whole string of 1st number,action, 2nd number?

Also once I do get that working correctly:
Wouldn't eval(document.calculator.display.value= memory) in my HTML for the "=" give me the calculation. ( if I could figure out how to have memory store the 1st number and action1 and 2nd number all together)
Or would eval(document.calculator.display.value) do it for me.
////////////////////////////////////////////////////////////////////////////////////

<html>
<head>
<title> Calculator</title>


</head>
<script type = "text/javascript" src="calculator2.js"></script>
<body>
<center>Calculator<br>
To use this calculator, CLICK a number, then an ACTION, then another
number, then the EQUALS button. <br>
Press "C" when ready to start over.
<br> The "N" button makes your previous number a negative.<br></center>

<form name="calculator">

<table border = "1" align ="center">
<tr>
<td ><input type = "text" size = 26 name = "display" id = ""/></td>
</tr>

<tr ><br />
<!-- first row of calculator -->
<td>
<input type = "button" value = " 7 " id = ""
onclick="newstring('7')">

<input type = "button" value = " 8 " id = ""
onclick="newstring('8')"/>
<input type = "button" value = " 9 " id = ""
onclick="newstring('9')">
<input type = "button" value = " / " id = ""
onclick="action1('/')">
</td>
</tr>
<tr ><br />
<!-- second row of calculator -->

<td>
<input type = "button" value = " 4 " id = ""
onclick="newstring('4')">
<input type = "button" value = " 5 " id = ""
onclick="newstring('5')">
<input type = "button" value = " 6 " id = ""
onclick="newstring('6')">
<input type = "button" value = " * " id = ""
onclick="action1('*')">
</td>
</tr>

<tr ><br />
<!-- third row of calculator -->

<td>
<input type = "button" value = " 1 " id = ""
onclick="newstring('1')">
<input type = "button" value = " 2 " id = ""
onclick="newstring('2')">
<input type = "button" value = " 3 " id = ""
onclick="newstring('3')">
<input type = "button" value = " - " id = ""
onclick="action1('-')">
</td>
</tr>

<tr ><br />
<!-- forth row of calculator -->

<td>
<input type = "button" value = " 0 " id = ""
onclick="newstring('0')">
<input type = "button" value = " N " id = ""
onclick="newstring('N')">
<input type = "button" value = " = " id = ""
onclick="eval(document.calculator.display.value= memory)">
<input type = "button" value = " + " id = ""
onclick="action1('+')">
</td>
</tr>

<tr ><br />
<!-- fifth row of calculator -->

<td>
<input type = "button" value = " &nbsp " id = "">
<input type = "button" value = " &nbsp " id = "">
<input type = "button" value = " &nbsp " id = "">
<input type = "button" value = " C " id = ""
onclick="clearCalc()">
</td>
</tr>

</table>

</body>

</form>

</html>

///////////////////////////////////////////////////////////////////////////////////////

javascript

memory = "0";
current = 0;
operation =0;
function newstring(digit)
{
current=document.calculator.display.value;
if (digit >= 0 && digit <=9)
{
if(current==0)
{
current = digit;
}
else
{
current = current + digit;
}
}

document.calculator.display.value=current;
memory= current;

}

function action1(newaction)
{
operation = document.calculator.display.value;
if (newaction == '+')
{
operation = newaction;
}
else if (newaction == '-')
{
operation = newaction;
}
else if (newaction == '*')
{
operation = newaction;
}
else if (newaction == '/')
{
operation = newaction;
}

memory= memory + operation;
document.calculator.display.value=memory ;

}
function clearCalc()
{
document.calculator.display.value=null;
num1= null;
num2 = null;
lastaction= null;
action = null;
}

I'm making a form for my rural neighbors' electricity calculations.
My main problem is getting the Previous and Current reading to subtract each other and post in the "kwh Used" column.

My plan is to continue doing the calculations after I find that value.

Here is the code thus far:
Code:

<head>

<title>Untitled Document</title>
<script language="javascript">

function calc()
	{
	preR= Number(document.Bill_cal.PrRe.value);
	curR= Number(document.Bill_cal.CuRe.value);
	diff=preR-curR;
	document.getElementByID("kwhu").innerHTML=diff;
	
		
	}
</script>
</head>

<body><center>
<form name="Bill_cal" method="post" />
<input type="checkbox" value="Residential Account" name="Residential_Account"  />Residential Account


<input type="checkbox" value="GSS/Business Account" name="GSS_Business Account" />GSS/Business Account


<br />
<br/> 

<input type="checkbox" value="Winter_Rate" name="Winter_Rate" onchange="" />Winter Rate
<input type="checkbox" value="Summer_Rate" name="Summer_Rate" onchange="" />Summer Rate


<br />
<br/> 


<input type="checkbox" value="Butler" name="Butler" onchange="" />Butler

<input type="checkbox" value="Chautauqua"  name="Chautauqua" onchange="" />Chautauqua


<input type="checkbox" value="Cowley" name="Cowley" onchange="" />Cowley

<input type="checkbox" value="Elk"  name="Elk" onchange="" />Elk


<input type="checkbox" value="Montgomery"  name="Montgomery" onchange="" />Montgomery


<br/> 
<br/> 


<input type="checkbox" value="Security Light" name="Security" />
Security Light
(Check if Yes)


<br/>
<br/> 

</center>
<center>

<table width="600" border="1"><center>
  <tr>
    <th width="254" scope="col">&nbsp;</th>
    <th width="168" scope="col">&nbsp;</th>
    <th width="156" scope="col">&nbsp;</th>
  </tr>
  <tr>
    <th scope="row">Previous Reading</th>
    <td><input type="text" name="PrRe" value="" /></td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">Current Reading</th>
    <td><input type="text" name="CuRe" value="" /></td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">kwh Used</th>
    <td>
    <p id="kwhu"></p>
    
    </td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">kwh Charge</th>
    <td></td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">Subtotal</th>
    <td>$</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">Tax</th>
    <td>$</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">PCA Charge from card:</th>
    <td><input type="text" name="PCA" value="" /></td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">Any Additional amount from card:</th>
    <td><input type="text" name="PCA" value="" /></td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <th scope="row">Total:</th>
    <td>$</td>
    <td>&nbsp;</td>
  </tr>
</center></table>

<input type="submit" value="Click here" onclick="calc()"> 
</form>



</center></body>
</html>

One other issue I will probably run into and while I am on here posting.
Can I preform a if statement within a if statement? Example:

Code:

	if (Business is checked)
	{
		if (Winter is Checked)
			{
			}
		else if (Summer is Checked)
			{
			}
	}

Hi. I am new to javascript programming so please go easy on me. I am creating a site for a flooring store and need to include a price calculator/estimator.
What I need to do is allow the visitor to input the room size (length x width) and choose a flooring material from a pulldown list, and receive a price.
The pulldown list would have flooring materials such as carpet, tile, wood, etc and each of these would have a fixed dollar amount associated with them (which would be hidden).
So basically it is just a script that would multiply 3 numbers, with two of the numbers being input by the visitor, and th tird being selected from the pulldown.
Can someone please educate me on how to do this?

I've been working on this for a few days now and I'm not sure if it could be done or not. I'm trying to do the following complex formula in Adobe Acrobat. I want to be able to calculate tInterest (Total Interest Due) = fDays (# of days) * .0002739726 (interest rate) * PrincipalAmt (principal) but ONLY IF fDays > 90 or if CheckBox1 is checked then fDays > 180, otherwise tInterest = 0.

See, I'm trying to create a form where the interest is only to be calculated if 90 days has elapsed OR 180 days has elapsed if checked off.Either way, interest is to be calculated from StartDate.

Is this possible?