function dealSumMoney(money_num){	var num = money_num.split('.')[0];	var length = num.length;	var group = length/3 + 1;	var result = "";	for(var i=0 ; i< group ; i++){					if((length-3*(i+1))<=0){				result = num.substring(0,length-3*i)+result;			}else{								result=","+num.substring((length-3*(i+1)),(length-3*i))+result;			}					} 	if(money_num.split('.')[1] != null ){		return result+ "." + money_num.split('.')[1];	}	return result ;}alert(dealSumMoney("50000"));alert(dealSumMoney("50000.00"));