js-格式化数字保留两位小数-带千分符

<input type="text" class="input_text input_number" name="mgsy_dbnfjlr" value=""  onblur="this.value=fouces_qfh(this.value)" />

/**
* 自动补充百分比符号
* @param obj
* @returns {String}
*/
function fouces_bfh(obj) {
var o = obj.replace(',', '') + "";
if (o.indexOf("%") > -1) {
o = o.replace('%', '') + "";
//o = Number(o)/100;
}else{
o = o*100;
}
o = format1(o);
if (o.indexOf(".") <= -1) {
return o += ".00%";
}
if (o.substr(o.length - 1, 1) == ".") {
return o += ".00%";
}
if (o.substr(o.length - 2, 1) == ".") {
return o += "0%";
}
return o + "%";
}

/**
* 千分符格式化
* @param num
* @returns
*/
function format1 (num) {
if( num == null || num == undefined || num == ""  ){
return "";
}
if( isNaN(num)) return num;
//alert(num);
//return (parseFloat(num).toFixed(2) + '').replace(/\d{1,3}(?=(\d{3})+(\.\d*)?$)/g, '$&,');
return (toFixed(num,2) + '').replace(/\d{1,3}(?=(\d{3})+(\.\d*)?$)/g, '$&,');
}

function toFixed(number, precision) {
var b = 1;
if (isNaN(number)) return number;
if (number < 0) b = -1;
var multiplier = Math.pow(10, precision);
return Math.round(Math.abs(number) * multiplier) / multiplier * b;
}

/**
* 千分符格式化
* @param num
* @returns
*/
function format1 (num) {
if( num == null || num == undefined || num == ""  ){
return "";
}
if( isNaN(num)) return num;
//alert(num);
return (parseFloat(num).toFixed(2) + '').replace(/\d{1,3}(?=(\d{3})+(\.\d*)?$)/g, '$&,');
//return (toFixed(num,2) + '').replace(/\d{1,3}(?=(\d{3})+(\.\d*)?$)/g, '$&,');
}