Money Formatter for JavaScript Number Prototype

formatMoney.js

Number.prototype.formatMoney=function(c,d,t,sym){var n=this,c=isNaN(c=Math.abs(c))?2:c,d=d==undefined?",":d,t=t==undefined?".":t,s=n<0?"-":"",i=parseInt(n=Math.abs(+n||0).toFixed(c))+"",j=(j=i.length)>3?j%3:0,sym=sym==undefined?"$":sym;return sym+s+(j?i.substr(0,j)+d:"")+i.substr(j).replace(/(\d{3})(?=\d)/g,"$1"+d)+(c?t+Math.abs(n - i).toFixed(c).slice(2):"");};