JS-格式化数字保留两位小数

很多时候发现有时候js会提示自带函数不能使用，所以自己找了很多资料实现了个

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

js函数

/**
 * 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;
}
 
 另

/**
 * 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*)?$)/g, '$&,');
}