Currency Conversion Function

[budapestnori]

This function is working great, until a number 2000 or above is introduced, why? I didn't write it, i got it from the net.

function formatCurrency(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + num + '.' + cents);
}

 

[budapestnori]

OOOPs, maybe I am mistaken. Here are more details. I am using it on this page -

http://tmh.netdbs.com/myers/clients/prints1.asp

When you go above a total of 2,000 in the context of my code, is when the format currency is not working, so it must be a bug in my code,and not the above code.

Here is my code:

function calculatePrintTotal(objx,price,img_total)
{
x = parseFloat(objx.value);
y = parseFloat(price);
z = parseFloat(img_total.value);

t = formatCurrency((z+(x*y)));
img_total.value = formatCurrency(t);

}