JS金额格式化详解编程语言

/格式化金额,小数点几位 
function fmoney(money,digit){ 
    if(null == money ){ 
        return ""; 
    } 
    money = money +""; 
    var array = money.split("."); 
    var s =array[0]; 
    var r=""; 
    var m= s.substring(0,1); 
    if('-'== m){ 
        s = s.substring(1); 
    }else { 
        m =""; 
    } 
    var f= s.split("").reverse(); 
    for(var i = 0;i< f.length;i++){ 
        r += f[i] + ((i + 1) % 3 == 0 && (i + 1) != f.length ? "," : ""); 
    } 
    var after = ""; 
    if(array.length>1){ 
        after = array[1]; 
        if(after.length>digit){ 
            after =after.substring(0,digit); 
        } 
    } 
    return m + r.split("").reverse().join("") + (array.length>1?"."+ after:""); 
} 
 
 
isString: function(str){ 
        return (typeof str=='string')&&str.constructor==String; 
    }, 
    // 千分位显示数据 
    formatThousandths: function(num, decimal){ 
        if($.isString(num)) num = parseFloat(num); 
        if(null == decimal || decimal == undefined) decimal = 2; 
        return (num.toFixed(decimal) + '').replace(//d{1,3}(?=(/d{3})+(/./d*)?$)/g, '$&,'); 
    }