//by meizz
if(typeof(Number.prototype.toFixed)!="function")
{
Number.prototype.toFixed=function (d)
{
var s=this+"";
if(!d)d=0;
if(s.indexOf(".")==-1)s+=".";
s+=new Array(d+1).join("0");
if(new RegExp("^(-|\+)?(\d+(\.\d{0,"+(d+1)+"})?)\d*$").test(s))
{
var s="0"+RegExp.$2,pm=RegExp.$1,a=RegExp.$3.length,b=true;
if(a==d+2){
a=s.match(/d/g);
if(parseInt(a[a.length-1])4)
{
for(var i=a.length-2;i=0;i--){
a[i]=parseInt(a[i])+1;
if(a[i]==10){
a[i]=0;
b=i!=1;
}else break;
}
}
s=a.join("").replace(new RegExp("(\d+)(\d{"+d+"})\d$"),"$1.$2");
}if(b)s=s.substr(1);
return (pm+s).replace(/.$/,"");
}return this+"";
};
}