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JavaScript - Preventing A Negative Number
If a negative number is entered into the reading variable it should be displayed as a zero. This works with the first calculations such as average but right at they very end the the alert wont display the highest average it just displays the one which has a negative number typed in to it.
Code: var region=0
var reading=0
var average=0
var count=0
var readingSum=0
var catergory=0
var dry=0
var normal=0
var wet=0
var countWet=0
var countNormal=0
var countDry=0
var totalLoop=0
var numLocations=0
var maxAverage=0
var maxRegion=0
var maxReadings=0
var totalReadings=0
// ** Find out how many locations ** //
numLocations=eval(prompt("How many locations are you taking readings for?"));
// ** Loop for multiple entries ** //
for(totalLoop=1; totalLoop<=numLocations; totalLoop=totalLoop+1)
{
// ** Reset total for loop ** //
readingSum=0
// ** Get Region ** //
region = prompt("Enter region please");
// ** Get Readings ** //
totalReadings = eval(prompt("Enter readings please"));
// ** Get readings and Prevent negative number ** //
if(totalReadings<=0)
{
alert("Please enter valid reading")
}
else
{
alert("You entered " + totalReadings);
}
// ** Ask for indivdual readings ** //
for(count=1; count<=totalReadings; count=count+1)
{
reading=eval(prompt("Enter reading please"));
// ** Prevent negative number ** //
if(reading<0)
{
reading=0
alert("Please enter valid reading")
}
// ** Work out Total of readings ** //
readingSum= readingSum + reading
}
// ** Work out average ** //
average= readingSum/totalReadings
// ** Put average into a category and display everything ** //
if(average<5)
{
catergory="dry"
countDry=countDry+1
}
else if(average>=5 && average<20)
{
catergory="normal"
countNormal= countNormal+1
}
else if(average>20)
{
catergory="wet"
countWet=countWet+1
}
alert("Location is " + region + "\nNumber of weakly readings taken is " + totalReadings + "\nTotal of readings is " + readingSum + "\nAverage is " + average + "\nLocation is " + catergory);
// ** Find Highest average ** //
if((average>maxAverage) || (totalReadings>maxReadings))
{
maxAverage=average
maxRegion=region
}
}
// ** Final Report ** //
alert("Number of locations is " + numLocations + "\nDry is " + countDry + "\nNormal is " + countNormal + "\nWet is " + countWet + "\nLocation with highest average reading is " + maxRegion + "\nHighest average is " + maxAverage);
Do i need a while loop? i am only allowed to use while, for and if statements Similar Tutorialsis there js to prevent malicious clickers who try to ban my site from google ads by clicking so many times?
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$('.colour-picker-colour').css('backgroundColor', '#' + hex);
$('.background').css('backgroundColor', '#' + hex);
$('.colour').css('backgroundColor', '#' + hex);
$('.colour-text').css('color', '#' + hex);
$('a .colour-text').css('color', '#' + hex);
$('.colour-text-hover:hover').css('color', '#' + hex);
$('.tabs a:hover').css('color', '#' + hex);
$('.seperator').css('backgroundColor', '#' + hex);
$.cookie('ludatha_colour', hex, { expires: 365 });
}
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if (document.forms["form"]["number"].value=="123") {
submit} else {alert ("Cant submit because the number doesn't match.");
return false;
}
}
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{
var row = document.createElement("tr");
var cell, input;
cell = document.createElement("td");
cell.className = "weight";
input = document.createElement("input");
input.name = "weight_" + qnum;
input.onkeypress = "return isNumberKey(event)";
cell.appendChild(input);
row.appendChild(cell);
}
I am using Code: var number = -141; later on when i use the variable number in another calculation, for example Code: var result = 450 + number; I get the result NaN. How can i rectify this? Thanks When I used toFixed() method on a number, I thought that this method round a number to a specified approximation, but I got a surprising result, the number became string! 15.23689 .toFixed ( 2 ) ==> "15.24" So does it convert the number into string? I am trying to figure out how to make a random number I can plug into a script count down from that number at certain times of the day until it reaches 0. I would like it to reset itself at midnight every day. I'm trying to make it work with a script I found on here that resets itself at midnight every day. So instead of it counting down too fast, it would count down to the next number after a randomly generated number of minutes until it reaches 0. But it wouldn't necessarily have to end at 0 at midnight. It could go from 845 to 323 at the end of the day at a slower pace. Is that possible?
I'm just starting out learning and have sort of given myself a couple of basic problems to solve. I pretty quickly found something that's apparently hard to Google. I've made a page that shows a counter number, starting at 0, with buttons that will increase or decrease the number by 1 or 10. So I'd like to figure out how to show that number in red when it is a negative number and in green when it is a positive number. I've tried a couple of things, including an if... else, but here's my latest crack: Code: var counter=0;
function countUp() {
lastCounter=counter;
counter++;
display();
}
function countDown() {
lastCounter=counter;
counter--;
display();
}
function tenUp() {
lastCounter=counter;
counter+=10;
display();
}
function tenDown() {
lastCounter=counter;
counter-=10;
display();
}
function lastNumber() {
counter=lastCounter
document.getElementById("number").innerHTML=lastCounter;
}
function display () {
number=counter+'';
switch(counter) {
case counter== 0;
document.getElementById("number").innerHTML=number.fontcolor(white);
break;
case counter> 0;
document.getElementById("number").innerHTML=number.fontcolor(green);
break;
case counter< 0;
document.getElementById("number").innerHTML=number.fontcolor(red);
break;
} //end switch
} //end display
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$(function(){
//original field values
var field_values = {
//id : value
'name' : 'your name',
'email' : 'your email',
'yourmessage' : 'I would like to inquire about'
};
//inputfocus
$('input#name').inputfocus({ value: field_values['name'] });
$('input#email').inputfocus({ value: field_values['email'] });
$('textarea#yourmessage').inputfocus({ value: field_values['yourmessage'] });
//form validation
$('form').submit(function validateForm(){ return false }); // removing this return false seems to mess up validation
$('#submit').click(function(){
//remove classes
$('#sendamessage input').removeClass('error').removeClass('valid');
//ckeck if inputs aren't empty
var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
var fields1 = $('#sendamessage input[type=text],#sendamessage textarea');
var error = 0;
fields1.each(function(){
var value = $(this).val();
if( value.length<2 || value==field_values[$(this).attr('id')] || ( $(this).attr('id')=='email' && !emailPattern.test(value) ) ) {
$(this).addClass('error'); // css class
$(this).effect("shake", { times:3 }, 50);
error++;
} else {
$(this).addClass('valid'); // css class
}
});
if(!error) {
// this is where I get confused. How do I make this send the form?
alert('Data sent');
});
}
});
});
// END JAVASCRIPT
<form method="post" action="" onsubmit="return validateForm()" >
<input type="hidden" name="ccf_customhtml" value="1" />
<input type="hidden" name="success_message" value="Thank you for filling out our form!" />
<input type="hidden" name="destination_email" value="dauidus@gmail.com" />
<input type="hidden" name="required_fields" value="" />
<label for="name">Name</label>
<input type="text" name="name" id="name" value="your name" />
<label for="email">Email</label>
<input type="text" name="email" id="email" value="your email" />
<label for="yourmessage">Your Message</label>
<textarea name="yourmessage" id="yourmessage" value="I would like to inquire about" style="margin-bottom:20px;" />I would like to inquire about</textarea>
<input class="send submit" id="submit" type="submit" value="" style="position: relative; bottom: -70px; left: 25px; " />
</form>
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Code: function makefarm(){
document.getElementById("farms").value ++ ;
document.getElementById("pop").value -=2 ;
document.getElementById("coin").value -=10 ;
document.getElementById("lumber").value -=20 ;
document.getElementById("CIfarm").value ++ ;
document.getElementById("CIfarm").value ++ ;
document.getElementById("CIfarm").value ++ ;
document.getElementById("CIfarm").value ++ ;
document.getElementById("CIfarm").value ++ ;
}
function upgradefarm(){
document.getElementById("iron").value -=5 ;
document.getElementById("coin").value -=20 ;
document.getElementById("farmupgrades").value ++ ;
}
var food = function () {
var f1 = document.getElementById('buttonhere');
var f2 = '<input type="button" value="Make Farm" onclick="makefarm()" /> Farms:<input type="text" id="farms" size="1" value=0 style="background-color:transparent;border:0px solid white;" READONLY/> <input type="button" value="Upgrade Farm" onclick="upgradefarm()" /> Farm Upgrades:<input type="text" id="farmupgrades" size="1" value=0 style="background-color:transparent;border:0px solid white;" READONLY/> <br/><br/><br/> Current Income:<input type="text" id="CIfarm" size="1" value=0 style="background-color:transparent;border:0px solid white;" READONLY/>';
f1.innerHTML = f2;
}
Code: Coin:<input type="text" id="coin" value=50 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> Lumber:<input type="text" id="lumber" value=100 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> Iron:<input type="text" id="iron" value=25 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> Food:<input type="text" id="food" value=100 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> POP:<input type="text" id="pop" value=10 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> so if i press the makefarm() button it will add to the numbers but if i press it again they will got to zero how could i make it remember the numbers?(the input boxes are the second code) Hi All, I have a problem in javascript. When i am doing rounding of the value i am getting the o/p like 2.2e4. I have to display this value in decimal value(2.0002) not in exponential. Can any one please help me to resolve this issue.? Regards, VIjai I can generate a random number between 1 and 9, ( var rand_no = Math.floor( 1 + Math.random() * 9 ); ) but I want to add that random number to a value that is enterred into an inputbox and get a total. How can I do this using Javascript and put the result into a hidden field. I will also need to use that same random number in another place on another form . Thanks I need to write something like this: http://justsheri.com/webscripting/wsassignment/1049950/ If you look at the code there is 52 of these <img src = './images/blank1.png' onClick='clickCard("qh",0)'/> where clickcard("numchanges", increments by 1) how is this done? Thanks Danny |
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