How do i format numbers into currency as the user is entering

[thepreacher]

Hi all, i need to format numerical input as the user is entering it so that in the end i will have for example 12345600 as 123,456.00 before they submit the data. I seen a few functions on the net but they all do the formating after the number has been entered. I recon i will use the onKeyup event handler.

Thanks for your help.

[CrYpTiC_MauleR]

Code

Language: html (GeSHi-highlighted)
<script type='text/javascript'>

function numberFormat(num)
{
    num = num.toString().replace(/[,.]/g, '');
    num = num.replace(/\d{2}$/, '.' + num.substr(num.length - 2, 2));
    var regex = new RegExp('(\\d+)(\\d{3})');
    while (regex.test(num))
    {
        num = num.replace(regex, '$1,$2');
    }
    return num;
}

</script>
<input type='text' name='whatever' onkeyup='this.value=numberFormat(this.value)' />

That should do it =o)