I need only 2 decimal place

@oceanmaidJul 26.2004

For an instant, under “GRT” if I were to key in 45578, instantly under “Port Dues” would be 1002.716(the result is as such due to a formula).

The thing is, instead of 1002.716, I want the result to be in two decimal place only, e.g, 1002.71 instead.

What would be the function be?

Link -> ~~[url]~~http://www.oceanbulk.com.sg/mat.html[/url]

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JavaScript

13 Comments(s) _↴

@steelersfan88Jul 26.2004 — #Try the roundTo() prototype:

&lt;script type="text/javascript"&gt;
 
 Number.prototype.roundTo = function(d) {
 return (Math.round(this * Math.pow(10,d)) / Math.pow(10,d))
 }
 
 var num = 215.561
 alert(num.roundTo(0))
 alert(num.roundTo(1))
 alert(num.roundTo(2))
 
 &lt;/script&gt;

Dr. Script

@Mr_JJul 26.2004 — #You could also use

var num = 215.561

alert(num.toFixed(2))

@steelersfan88Jul 26.2004 — #but the toFixed() prototype returns a string

@Mr_JJul 26.2004 — #You learn something new everyday ?

Thanks

@oceanmaidauthorJul 27.2004 — #I don't know what you two guys talking about...In anyway, it's not working at all. Could you insert the function for me and send me the whole script? Gee, thanks....:p

@steelersfan88Jul 27.2004 — #Actually, they both work. Please provide the code you are using. Neither Mr J nor I can guess you you want this to be implemented, but we both gave prototypes that will return rounded results.

We both also provided at least one example of how to use both methods to round a number.

Dr. Script

@steelersfan88Jul 27.2004 — #By the way, this is the whole script:

[code=php]<script type="text/javascript">
 
 Number.prototype.roundTo = function(d) {
 return (Math.round(this * Math.pow(10,d)) / Math.pow(10,d))
 }
 
 var num = 215.561
 alert(num.roundTo(0))
 alert(num.roundTo(1))
 alert(num.roundTo(2))
 
 </script>[/code]

You round it by adding the [font=monospace]roundTo([i]dec_places[/i])[/font]. This will not change the variable to be rounded, then you'd have to do:

 //JavaScript:
 var num = 215.561
 num = num.roundTo(2)

Dr. Script

@oceanmaidauthorJul 28.2004 — #It's obviously not working...

C for your self...?

http://www.oceanbulk.com.sg/mat.html

@steelersfan88Jul 28.2004 — #You didn't even put the code in ... how will it work without the code?

@oceanmaidauthorJul 28.2004 — #Where exactly should I put the code?

@steelersfan88Jul 28.2004 — #Along the lines of:

[code=php]  document.getElementById('amount1').value=Number(document.getElementById('a').value)*Number(document.getElementById('unit').value).roundTo(2);
 document.getElementById('amount2').value=Number(document.getElementById('b').value)*Number(document.getElementById('unit1').value).roundTo(2);
 document.getElementById('amount3').value=Number(document.getElementById('c').value)*Number(document.getElementById('unit2').value).roundTo(2);
 document.getElementById('amount4').value=Number(document.getElementById('d').value)*Number(document.getElementById('unit3').value).roundTo(2);
 document.getElementById('amount5').value=Number(document.getElementById('e').value)*Number(document.getElementById('unit4').value).roundTo(2);
 document.getElementById('amount6').value=Number(document.getElementById('f').value)*Number(document.getElementById('unit5').value).roundTo(2);
 document.getElementById('amount7').value=Number(document.getElementById('g').value)*Number(document.getElementById('unit6').value).roundTo(2);
 document.getElementById('amount8').value=Number(document.getElementById('h').value)*Number(document.getElementById('unit7').value).roundTo(2);
 document.getElementById('amount9').value=Number(document.getElementById('i').value)*Number(document.getElementById('unit8').value).roundTo(2);
 document.getElementById('amount10').value=Number(document.getElementById('j').value)*Number(document.getElementById('unit9').value).roundTo(2);
 document.getElementById('amount11').value=Number(document.getElementById('k').value)*Number(document.getElementById('unit10').value).roundTo(2);
 document.getElementById('amount12').value=Number(document.getElementById('l').value)*Number(document.getElementById('unit11').value).roundTo(2);[/code]

Then add:

//JavaScript
 Number.prototype.roundTo = function(d) {
 return (Math.round(this * Math.pow(10,d)) / Math.pow(10,d))
 }

Dr. Script

@oceanmaidauthorJul 29.2004 — #I can't understand why..but obviously, it's not working, though.?

@NedalsJul 29.2004 — #Change the lines of javascript to this (with appropiate id's)

document.getElementById('amount1').value=(document.getElementById('a').value * document.getElementById('unit').value).toFixed(2);

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