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JavaScript - Dynamically Calculate A Div Width
Hi,
Here are sample divisions: Code: <style type="text/css">
#grandparent {width:100px;}
#parent {overflow:auto; height:100px; }
.child {overflow:hidden; margin-left:10px;}
</style>
<div id="grandparent">
<div id="parent">
<div class="child">1000000000000000000000000</div>
<div class="child">1000000000000000000000000</div>
<div class="child">1000000000000000000000000</div>
<div class="child">1000000000000000000000000</div>
<div class="child">1000000000000000000000000</div>
<div class="child">1000000000000000000000000</div>
<div class="child">1000000000000000000000000</div>
</div>
</div>
The <div class="child"> width value is always 10 pixels less than <div id="parent"> width value. How can it be calculated so any width value is given to <div id="parent">, its child gets 10 pixels less than that? Any help is very much appreciated! Mike Similar TutorialsHi, Here's a sample division: Code: <div style="padding:0 0 0 30px; background:url(http://www.google.com/help/hc/images...ent_bubble.gif) left center no-repeat;">some text</div> I wonder how I can calculate the padding-left:30px dynamically so that any icon I choose the padding-left value changes according to the image width. Any help is appreciated! Hi everyone, I am pretty new to JS and I am looking for help writing a function that will dynamically calculate filed values. I have a PHP-generated form which may have a varying number of fields. I need to: 1. calculate the line total for each row -- unitprice * units = linetotal 2. calculate total of all linetotals. I have named my fields as follows: unitprice[1], unitprice[2]... , units[1], units[2], ... I have the following calculate function: Code: function calculateOld() {
// get both values
unitprice = document.forms["invoice"].unitprice.value;
units = document.forms["invoice"].units.value;
// do some calculation
lineTotal = formatNumber((unitprice * units), 2);
// set the value in the right field
document.forms["invoice"].linetotal.value = lineTotal;
unitprice2 = document.forms["invoice"].unitprice2.value;
units2 = document.forms["invoice"].units2.value;
if(unitprice2 != '') {
// do some calculation
lineTotal2 = formatNumber((unitprice2 * units2), 2);
// set the value in the right field
document.forms["invoice"].linetotal2.value = lineTotal2;
document.forms["invoice"].totalprice.value = formatNumber((parseFloat(lineTotal) + parseFloat(lineTotal2)),2);
}
else {
document.forms["invoice"].linetotal2.value = '';
document.forms["invoice"].totalprice.value = formatNumber(lineTotal,2);
}
}
This does calculate what I need but only if I have up to two rows. I need to make the function dynamically count how many rows there are, and calculate the linetotal for each row. And here's where my limited JS knowledge brings me to a halt. I have been thinking about what this new and dynamic function should look like, but that's the best I could produce... Code: function calculate() {
var unitprice[i] = document.forms["invoice"].unitprice[i].value;
var units[i] = document.forms["invoice"].units[i].value;
var linetotal[i] = formatNumber((unitprice[i] * units[i]), 2);
return linetotal;
}
Your help will be appreciated. Please explain how things are done, don't just give me the code. Thanks in advance! Hello, let me try to explain better what I'm trying to do. I'm a real newbie I don't know much javascript but I understand more or less the logic behind it... tell me if this solution should work and if you know how to do it please show me. I have this page. http://felixdeportu.com/5/ The images are inside a div#content div#photo. I need to make div#photo's width to match the total width measurement of all the images it contains. If you load the page and you don't touch the size, it will work fine... but that's not realistic. If I resize the page, which will happen often on this kind of page (I'm assuming), the whole thing goes haywire (try it, scroll to the last image and resize the page you'll see what I mean). What can I do? Is my idea the right solution? Am I not explaining this clearly enough? Let me know please, I'm desperate. I've been trying to get CSS to do this for me for 3 hours now. Nothing works... I want to set the width of a div to be the same width of the image inside the div. The following code works great. But... The images are different widths, so both wrappers are set to the width of the first image. Without having to add an ID to each wrapper or image, can the wrapper width be set to the image width using the name of the image as the unique identifier? Any help would be great! PHP Code: jQuery: $(document).ready(function(){ var newWidth = $('div.wrapper img').attr('width'); $('div.wrapper').width(newWidth); }); HTML: <div class="wrapper"> <p><img src="image1.jpg" width="200" /><br /> Caption</p> </div> <div class="wrapper"> <p><img src="image2.jpg" width="250" /><br /> Caption</p> </div> hi, I've got a problem and i really need help. this is my code <script> var y= new Date(); y.getFullYear() + '<br />'; alert(y); var year = new Date(); year.setFullYear(prompt('Enter the year','1990'),prompt('Enter the month','1'), prompt('Enter the day','1')); alert(year); var yy = y-year; alert(yy); </script> i want when a user write his/her birthday JS calculate the age. that's all I want to do a calculation between selectbox values. The problem with my code is that the first part of the calculation only gives me 0, which Motherboard value*quantity. the second part works fine which Chassis*quantity. My formulas is motherbord*Quanity+chassis*quantity. Code:
function calculate() {
var parsedMotherboard = parseFloat(document.calcform.Motherboard.value || 0);
var parsedQuantity = parseFloat(document.calcform.Quantity.value || 0); var parsedChassis = parseFloat(document.calcform.Chassis.value || 0);
var parsedQuantity1 = parseFloat(document.calcform.Quantity1.value ||0);
document.calcform.total.value = (parsedMotherboard * parsedQuantity + parsedChassis * parsedQuantity1); }
PHP Code: echo "<tr><td align='left' width='90%'>"; $result = mysql_query("SELECT Motherboard_Part_Number, Motherboard_Name, Motherboard_Price FROM Motherboard ") or die(mysql_error()); echo '<select id="Motherboard" class="SelectClass" name="Motherboard" ONCHANGE="calculate()">'; // keeps getting the next row until there are no more to get while($row = mysql_fetch_array( $result )) { // Print out the contents of each row into a table echo '<option Name="Motherboard" value= ',$row['Motherboard_Price'],'>',$row['Motherboard_Part_Number'],' ',$row['Motherboard_Name'],' $',$row['Motherboard_Price'],' ','</option>'; } echo '</select>'; echo "</td>"; echo "<td align='right' width='10%'>"; $result= mysql_query("SELECT Number FROM Quantity") or die(mysql_error()); echo '<select id="Quantity" class="SelectClass" name="Quantity" Value="Quantity" ONCHANGE="calculate()" >'; // keeps getting the next row until there are no more to get while($row = mysql_fetch_array( $result)) { // Print out the contents of each row into a table echo '<option value=',$row['Number'],'>',$row['Number'],'</option>'; } echo '</select>'; echo "</td></tr>"; echo "<tr><td align='left' width='90%'>"; $result = mysql_query("SELECT Chassis_Part_Number, Chassis_Name, Chassis_Price FROM Chassis where Chassis_Form_Factor='ATX'") or die(mysql_error()); echo '<select id="Chassis" class="SelectClass" name="Chassis" ONCHANGE="calculate()">'; // keeps getting the next row until there are no more to get while($row = mysql_fetch_array( $result )) { // Print out the contents of each row into a table echo '<option Name="Chassis" value= ',$row['Chassis_Price'],'>',$row['Chassis_Part_Number'],' ',$row['Chassis_Name'],' $',$row['Chassis_Price'],' ','</option>'; } echo '</select>'; echo "</td>"; echo "<td align='right' width='10%'>"; $result= mysql_query("SELECT Number FROM Quantity") or die(mysql_error()); echo '<select id="Quantity" class="SelectClass" name="Quantity1" Value="Quantity" ONCHANGE="calculate()" >'; // keeps getting the next row until there are no more to get while($row = mysql_fetch_array( $result)) { // Print out the contents of each row into a table echo '<option value=',$row['Number'],'>',$row['Number'],'</option>'; } echo '</select>'; echo "</td></tr>"; I have tried many time to make the calculation to appear at the total text box. however, I fail to find where the problem is. Please help me.. here is my coding.. <html> <head> <title> PRESENTATION EVALUATION FORM </title></head> <style type="text/css"> .style1 { text-align: center; } </style> <script type="text/javascript"> function add($g1,$g2,$g3,$g4,$g5,$g6,$g7,$g8,$g9,$g10,$g11,$g12,$g13) { $g1=$_POST['document.myForm.gred1.value']; $g2=$_POST['gred3.value']; $g3=$_POST['gred3.value']; $g4=$_POST['gred4.value']; $g5=$_POST['gred5.value']; $g6=$_POST['gred6.value']; $g7=$_POST['gred7.value']; $g8=$_POST['gred8.value']; $g9=$_POST['gred9.value']; $g10=$_POST['gred10.value']; $g11=$_POST['gred11.value']; $g12=$_POST['gred12.value']; $g13=$_POST['gred13.value']; $total=$g1+$g2+$g3+$g4+$g5+$g6+$g7+$g8+$g9+$g10+$g11+$g12+$g13; } </script> <body> <center><img src="logo.gif" height="200" weight="240"></center> <p><center><b>FAKULTI SISTEM KOMPUTER & KEJURUTERAAN PERISIAN<br>UNIVERSITI MALAYSIA PAHANG</b></center></p> <table width="100% "border="1"> <form name="myForm" method="post"> <tr> <th style="width: 447px">ITEM</th> <th style="width: 340px">SCORE</th> </tr> <tr> <td style="width: 447px"> A) SLIDES</td> <td style="width: 340px"> </td> </tr> <tr> <td style="width: 447px"> i. Use of Diagram and Animations </td> <td style="width: 340px" class="style1"> <select name="gred1" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> </tr> <tr> <td style="width: 447px"> ii. Layout, Font and Color (Readable, Consistent, Attractive) </td> <td style="width: 340px" class="style1"> <select name="gred2" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> </tr> <tr> <td style="width: 447px"> iii. Content Structure</td> <td style="width: 340px" class="style1"> <select name="gred4" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select></td> </tr> <tr> <td style="width: 447px; height: 28px;"> iv. Slide Content</td> <td style="width: 340px; height: 28px;" class="style1"> <select name="gred3" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select></tr> <tr> <td style="width: 447px"> B) PRESENTATION</td> <td style="width: 340px"></td> </tr> <tr> <td style="width: 447px"> i. Explaining and Not Reading The Slides </td> <td style="width: 340px" class="style1"> <select name="gred5" onchange="add()" style="width: 45px; height: 22px;"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select> </tr> <tr> <td style="width: 447px"> ii. Voice, Eye Contact and Gestures</td> <td style="width: 340px" class="style1"> <select name="gred6" onchange="add()" style="width: 45px; height: 22px;"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select> </tr> <tr> <td style="width: 447px"> iii. Capture Audience Interest</td> <td style="width: 340px" class="style1"> <select name="gred7" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select> </tr> <tr> <td style="width: 447px"> iv. Proper Introduction and Closing</td> <td style="width: 340px" class="style1"> <select name="gred8" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select></td> </tr> <tr> <td style="width: 447px"> C) LANGUAGE</td> <td style="width: 340px" class="style1"> </tr> <tr> <td style="width: 447px"> i. Fluency </td> <td style="width: 340px" class="style1"> <select name="gred9" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select></td> </tr> <tr> <td style="width: 447px"> ii. Correctness</td> <td style="width: 340px" class="style1"> <select name="gred10" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> </tr> <tr> <td style="width: 447px"> iii. English Vocabulary</td> <td style="width: 340px" class="style1"> <select name="gred11" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> </tr> <tr> <td style="width: 447px"> D) QUESTION AND ANSWER HANDLING</td> <td style="width: 340px" class="style1"> </tr> <tr> <td style="width: 447px"> i. Confidence</td> <td style="width: 340px" class="style1"> <select name="gred12" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select> </tr> <tr> <td style="width: 447px"> ii. Logic Responds</td> <td style="width: 340px" class="style1"> <select name="gred13" onchange="add()" style="width: 45px"> <option value="0">0</option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> <option value="10">10</option> </select> </tr> <tr> <td style="width: 447px; height: 27px;"><center><b>Total</b></center></td> <td style="width: 340px; height: 27px;"><center> <input name="totalmark" type="text" style="width: 52px" value="0" > <?php echo $_POST["$total"];></center></td> </table> <table> <tr> <td class="style1" style="width: 802px"><br><input type="button" name="total" value="CALCULATE" onclick= "add()"> <input type="RESET" value="RESET"></td> </tr> </form> </table> </body> </html> hi, i need a help for experts out there. i've a set of questionnaire with 10 questions.answer for each question to choose from is 0-6 using radio button.for all the questions answered i need to calculate overall percentage based on the scores. i've done the html coding but having problem with javascript..is there any websites i can refer to write a coding or anyone can give example how to do it. pls help.. Hello. I wonder is there any javascript to calculate IP length For example I have Start ADDR: VLAN_ADDR which is: 10.52.28.0 Stop ADDR: VLAN_LAST which is 10.52.29.254 As I know:result is 512 or another example: Start ADDR: VLAN_ADDR which is: 10.52.64.11 Stop ADDR: VLAN_LAST which is 10.52.64.15 As I know:result is 5 How to count it in javascript code ? Results are "numbers" Best regards Leos. I'm working on creating a custom calculator to determine the amount of money / credits users may earn from referrals. I've tested onChange, and it will work only when I have changed to a new field or clicked off that field. How do I make this calculate live? So if the current value is 5 and I change it to 6, it will automatically recalculate the new value. You can see what I'm working on he http://sheetmusichaven.com/admin/mys...calculator.php Note: The one I'm testing is the 1st Level field. For now i'm just having it display the date. anyone would you help me I have some problem to calculate PHP Code: <table width="415" cellspacing="1" cellpadding="1"> <tr> <th width="151" scope="col">Price</th> <th width="189" scope="col">qty</th> <th width="63" scope="col">total</th> </tr> <tr> <td><label> <input name="price" type="text" id="price" value="2000"> </label></td> <td><label> <input name="qty" type="text" id="qty" value="2"> </label></td> <td><label> <input name="total" type="text" id="total" value="4000"> </label></td> </tr> <tr> <td><input name="price" type="text" id="price" value="2000"></td> <td><input name="qty" type="text" id="qty" value="4"></td> <td><input name="total" type="text" id="total" value="8000"></td> </tr> <tr> <td> </td> <td>Total</td> <td><label> <input name="gtotal" type="text" id="gtotal" value="12000"> </label></td> </tr> </table> How to calucate it from price * qty = Total and gtotal=sum of total, in the first rows. Ican do it if there is one row, but i dont know how to calculate samae name of text field like in 2nd or more rows Hi there, I'm new here in this forum and I've registered to ask a question about JavaScript or Jquery. I don't know which to use. I have my code php like that: <?php //Get the data from system and return in EU format function ShowDate() { $Date = date("d"."/"."m"."/"."Y"); return $Date; } //Get the time from system function ShowTime() { $Time = date("H".":"."i"); return $Time; } ?> Now I have two input box <html> <head> </head> <body> Type the date:<input name="txtdate" type="text" class="input" id="txtdate" title="e.g dd/mm/yyyy" value="<?php echo ShowDate(); ?>" size="9" maxlength="10"> <br> Type the time:<input name="txttime" type="text" id="txttime" value="<?php echo ShowTime(); ?>" size="5" maxlength="5"> <br> London: Friday May 21 2010 05:12:00 <br> New York: Friday May 21 2010 00:12:00<br> Hong Kong: Friday May 21 2010 12:12:00<br> Tokyo: Friday May 21 2010 13:12:00<br> </body> </html> So.... the important is the user can interactive with the date. If I change the date or time all this values will be change as well. Someone knows how can I do this? The field txtdate I will get from a calendar plugin (javascript) that I already put in my code. Thank you for your help. Andrei Andrade I am trying to calculate age based on the date of birth input into a text field. the date field should allow users to enter a one or two digit month, one or two digit date and a two or four digit year. Users should be able to enter any of the following date formats: 11-2-10, 1-25-2010, or 01/25/2010. On some days it works and others it wont, like 11-1-91 returns that the user is under 18. Code: function checkAge(){
var stDate = document.getElementById("birth").value;
var dayPartToDate = parseInt(stDate.substring(0,2),10);
var monPartToDate = parseInt(stDate.substring(3,5),10);
var yearPartToDate = parseInt(stDate.substring(6,10),10);
var dtTo = new Date(yearPartToDate, monPartToDate-1, dayPartToDate);
var mydate = new Date();
mydate.setDate(mydate.getDate());
var bday = dtTo - mydate
if (bday < 18){
window.alert("You must be 18 to rent equipment.");
document.getElementById("birth").value = "";
}
}
I am working on a form that has 15 rows for order entry. These rows are called: qty | part | desc | cost | amount I have the following ASP code that generates the rows: Code: <% For i = 1 To 15 %> <TR align=center><td><input type="text" NAME="qty<%Response.Write i%>" onChange='DoMath()'></td> <TD><INPUT TYPE="text" NAME="part<% Response.Write i %>"></TD> <TD><INPUT TYPE="text" NAME="desc<%Response.Write i %>"></TD> <TD><INPUT TYPE="text" NAME="cost<%Response.Write i%>" onChange="DoMath()"></TD> <TD><INPUT TYPE="text" NAME="amount<%Response.Write i%>" readonly></TD></TR> <% Next %> This gives me the following fields in the form: qty1 | part1 | desc1 | cost1 | amount1 qty2 | part2 | desc2 | cost2 | amount2 etc. My Javascript (DoMath) to calculate the row totals looks like this for now: Code: <script type='text/javascript'>
function DoMath(){
var Units = document.PlaceOrder.qty1.value;
var Rate = document.PlaceOrder.cost1.value;
var Total = Units * Rate;
document.PlaceOrder.amount1.value = Total.toFixed(2);
document.PlaceOrder.grandtotal.value = Total.toFixed(2);
}
</script>
This works fine for the first row, but I need it to scale for the rest of the rows, and also allow for future addition/expansion. Unfortunately, I am Javascript-tarded and can't figure it out, despite numerous examples online... I also need to find a way to recalculate the "grandtotal" box on the form based on whether or not the checkbox called "taxChecked" is checked. If the user checks it, I need it to recalculate the "grandtotal" field with a tax rate, and if they un-check it, it should recalcuate "grandtotal" WITHOUT the tax rate. Any suggestions or pointers are greatly appreciated! Hi there I have tried to work on this code for the last 2 weeks, can not figure out what is wrong with my code, please have a look for me, it will greatly appreciated from me; here my details; I work on <script type="text/javascript" language="javascript"> from dreamweaver to set my code to calculate, different Fiji tour (4 options, choose 1 in options) Payment (4 options, choose 1 in options) The cost of tour - discount base on tour cost. (discount has 4 different calculate) Need to be alert if they not choose 1 in each type. Second cost if they choose to fly out , will cost plus $400 on top the above cost. This is an optional, so they don;t need to buy if they want. I have attached my code, please have a look, Thank you very much I am trying to figure out how to calculate the date 30 days ago. I also will need to be able to change the interval. Anyone have a piece of code that does this? hi, I have three variables - string openTime format hh:mm - eg "08:30" - string closeTime format hh:mm eg "17:30" - float lunchHours eg 1.5 Are there any js functions I can use to calculate how many hours the shop is open ? thanks Hello, I'd like to be able to calculate the difference between 2 dates in the format dd/mm/yyyy var date1 = 06/01/2012 var date2 = 10/01/2012 Then an alert box would tell me there is a difference of 4 days. Thanks a bunch Jay. hi, can someone help me create an auto pro rata calculator where there are four [4] boxes. first box should be where we could enter the customer's plan [29,39,40 etc.] and it should be divided with what ever i will enter on the second box w/c will be for the number of days in a month [28,29,30,31]. the 3rd box should be where i can enter the number of days the cust. was able to use the service and it needs to be multiplied from box 2. 4th box should be a read only box where the pro rata will be displayed. so: [box 1] divided "/" by [box 2] multiplied "*" by [box 3] equals "=" to box four thanks!!! |
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