01.<script type="text/javascript">
02.function CommaFormatted(amount)
03.{
04. var delimiter = ",";
05. var a = amount.split('.',2)
06. var d = a[1];
07. var i = parseInt(a[0]);
08. if(isNaN(i)) { return ''; }
09. var minus = '';
10. if(i < 0) { minus = '-'; }
11. i = Math.abs(i);
12. var n = new String(i);
13. var a = [];
14. while(n.length > 3)
15. {
16. var nn = n.substr(n.length-3);
17. a.unshift(nn);
18. n = n.substr(0,n.length-3);
19. }
20. if(n.length > 0) { a.unshift(n); }
21. n = a.join(delimiter);
22. if(d.length < 1) { amount = n; }
23. else { amount = n + '.' + d; }
24. amount = minus + amount;
25. return amount;
26.}
27.alert(CommaFormatted('10000.2345'));
28.</script>
