Javascript - how to stop/halt/break this loop/script plss

•

What is DaniWeb IT Discussion Community?

You're currently browsing the JavaScript / DHTML / AJAX section within the Web Development category of DaniWeb, a massive community of 422,558 software developers, web developers, Internet marketers, and tech gurus who are all enthusiastic about making contacts, networking, and learning from each other. In fact, there are 4,656 IT professionals currently interacting right now! Registration is free, only takes a minute and lets you enjoy all of the interactive features of the site.

Join our community!

Please support our JavaScript / DHTML / AJAX advertiser: Lunarpages Web Hosting

Thread Tools Display Modes

Views: 4983 | Replies: 4

•

Join Date: Jul 2004

Posts: 2

Reputation: poseoff is an unknown quantity at this point

Rep Power: 0

Solved Threads: 0

poseoff

Offline

Newbie Poster

Javascript - how to stop/halt/break this loop/script plss

Dec 3rd, 2006

Hi,

I'm a newbie on javascript, and am experimenting with this simple script below.
I was wondering how could I halt/quite/close the script/program after pressing the X or CANCEL button?

I try to press X and CANCEL button, but it won't quit and this script results in infinite loop

Help with Code Tags

(Toggle Plain Text)

<html><head><title>Phone Cost</title></head>
<body on>

<script>
var i
var minutes
var monthly
var excess
var charge
var total

while (minutes=1)

{
minutes = prompt("Minutes Used:");
alert("Your entery was: "+minutes+"");

monthly=40
excess=minutes-600
charge=excess*0.49
total=monthly+charge

	if(minutes>=600)
	{
		document.write("Your Minutes Uses is: "+minutes+" <br>");
		document.write("Excess Minutes Uses is: "+excess+" <br>");
		document.write("Monthly Charges is: $"+monthly+".00<br>");
		document.write("Excess Minutes Charge is: "+charge+" <br>");
		document.write("Total Charge is: "+total+" <br><br><br>");
	}

	
	else
	{
		document.write("Your Minutes Uses is: "+minutes+" <br>");
		document.write("Monthly Charges is: $"+monthly+".00<br><br><br>");
	}
	
}
</script>

</body>
</html>

Pleaseee helppp...

•

Join Date: Oct 2006

Location: NY

Posts: 196

Reputation: Dukane is an unknown quantity at this point

Rep Power: 2

Solved Threads: 15

Dukane

Offline

Junior Poster

Re: Javascript - how to stop/halt/break this loop/script plss

Dec 4th, 2006

Problem #1 if (minutes = 1) should be if (minutes ==1). You want to check the value of minutes using the == operator. I'm not sure what the = will do in JavaScript, but it is probably checking to see if minutes is a declared variable and returns true since it is.

•

Join Date: Oct 2006

Location: India

Posts: 1,289

Reputation: vishesh is on a distinguished road

Rep Power: 4

Solved Threads: 32

vishesh

Offline

Nearly a Posting Virtuoso

Re: Javascript - how to stop/halt/break this loop/script plss

Dec 4th, 2006

•

Originally Posted by Dukane

Problem #1 if (minutes = 1) should be if (minutes ==1). You want to check the value of minutes using the == operator. I'm not sure what the = will do in JavaScript, but it is probably checking to see if minutes is a declared variable and returns true since it is.

he is right == checks equality and = equals the variable.

what code are u using for cancel button. have u used close() function.

wait, the <script> tag doesnt have all the necessary attributes also:
for javascript it must be

Help with Code Tags

(Toggle Plain Text)

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

Last edited by vishesh : Dec 4th, 2006 at 8:35 am.

•

Join Date: Jul 2006

Location: Deptford, London

Posts: 954

Reputation: MattEvans has a spectacular aura about

Rep Power: 5

Solved Threads: 48

MattEvans

Offline

Posting Shark

Re: Javascript - how to stop/halt/break this loop/script plss

Dec 4th, 2006

create a public/global variable called "stopped", set it to false when you start the loop.

inside the loop put:

Help with Code Tags

(Toggle Plain Text)

if(stopped){
  break;
}

then when you press "cancel" set the stopped variable to true.

If it only works in Internet Explorer; it doesn't work.

•

Join Date: Oct 2006

Location: NY

Posts: 196

Reputation: Dukane is an unknown quantity at this point

Rep Power: 2

Solved Threads: 15

Dukane

Offline

Junior Poster

Re: Javascript - how to stop/halt/break this loop/script plss

Dec 4th, 2006

I took a look at your code, and made a few adjustments. Do you see why this works vs. your code?

 Help with Code Tags 
 javascript Syntax (Toggle Plain Text) 
<script type="text/javascript" lang="javascript">
var i;
var minutes = 0;
var monthly;
var excess;
var charge;
var total;
 
while (minutes != null) {
    minutes = prompt("Minutes Used:");
    alert("Your entry was: " + minutes);
 
    monthly = 40;
    excess = minutes - 600;
    charge = excess * 0.49;
    total = monthly + charge;
 
    if (minutes >= 600) {
        document.write("Your Minutes Uses is: " + minutes + "<br>");
        document.write("Excess Minutes Uses is: " + excess + "<br>");
        document.write("Monthly Charges is: $" + monthly + ".00<br>");
        document.write("Excess Minutes Charge is: " + charge + "<br>");
        document.write("Total Charge is: " + total + "<br><br><br>");
    } else {
        document.write("Your Minutes Use is: " + minutes + "<br>");
        document.write("Monthly Charge is: $" + monthly + ".00<br><br><br>");
    }
}
</script>
<script type="text/javascript" lang="javascript">
var i;
var minutes = 0;
var monthly;
var excess;
var charge;
var total;

while (minutes != null) {
    minutes = prompt("Minutes Used:");
    alert("Your entry was: " + minutes);

    monthly = 40;
    excess = minutes - 600;
    charge = excess * 0.49;
    total = monthly + charge;

    if (minutes >= 600) {
        document.write("Your Minutes Uses is: " + minutes + "<br>");
        document.write("Excess Minutes Uses is: " + excess + "<br>");
        document.write("Monthly Charges is: $" + monthly + ".00<br>");
        document.write("Excess Minutes Charge is: " + charge + "<br>");
        document.write("Total Charge is: " + total + "<br><br><br>");
    } else {
        document.write("Your Minutes Use is: " + minutes + "<br>");
        document.write("Monthly Charge is: $" + monthly + ".00<br><br><br>");
    }
}
</script>