Javascript : Format number function

Case : You want to display format number in javascript
Solution :

function formatNumber (num,dec,thou,pnt,curr1,curr2,n1,n2) {
var x = Math.round(num * Math.pow(10,dec));if (x >= 0) n1=n2='';var y = (''+Math.abs(x)).split('');
var z = y.length - dec; if (z<0) i =" z;" z =" 1;"> 3) {
 z-=3; y.splice(z,0,thou);
}
var r = curr1+n1+y.join('')+n2+curr2;
return r;
}

Source : http://javascript.about.com/library/blnumfmt.htm