number format in jquery

1function number_format (number, decimals, dec_point, thousands_sep) {
2    // Strip all characters but numerical ones.
3    number = (number + '').replace(/[^0-9+\-Ee.]/g, '');
4    var n = !isFinite(+number) ? 0 : +number,
5        prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
6        sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
7        dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
8        s = '',
9        toFixedFix = function (n, prec) {
10            var k = Math.pow(10, prec);
11            return '' + Math.round(n * k) / k;
12        };
13    // Fix for IE parseFloat(0.55).toFixed(0) = 0;
14    s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
15    if (s[0].length > 3) {
16        s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
17    }
18    if ((s[1] || '').length < prec) {
19        s[1] = s[1] || '';
20        s[1] += new Array(prec - s[1].length + 1).join('0');
21    }
22    return s.join(dec);
23}