关于javascript:Javascript-补全数字占位

代码如下：

function GetFullNumber(num, length) {    var maxNumber = 1;    for (var i = 1; i < length; i++) {        maxNumber *= 10;    }    maxNumber = maxNumber.toString();    num = num.toString();    var startLength = num.length;    if (num.indexOf(".") >= 0) {        startLength = num.substring(0, num.indexOf(".")).length;    }    for (var i = startLength; i < maxNumber.length; i++) {        num = "0" + num;    }    return num;}

比方 GetFullNumber(9, 2) 返回 "09"，办法反对小数。