function formatnumber(expr,decplaces){
var str = ""
try {
str = str + Math.round(eval(expr) * Math.pow(10,decplaces));
}
catch(e) {

}

//alert(expr)
//alert(str)
while (str.length <= decplaces){
	str = "0" + str
	}
	//alert(str)
	var decpoint = str.length - decplaces
	
	return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);

}