asp.net Js裏面用padLeft ()方法

String.prototype.padLeft = function (padChar, width) {
    var ret = this;
    while (ret.length < width) {
        if (ret.length + padChar.length < width) {
            ret = padChar + ret;
        }
        else {
            ret = padChar.substring(0, width - ret.length) + ret;
        }
    }
    return ret;
}; 
  time = dates.getFullYear() + "-" + (dates.getMonth() + 1).toString().padLeft("0", 2) + "-" + dates.getDate().toString().padLeft("0", 2);例如，字符串用padleft方法，一定要引入jquery,否則不認也就是這個js    <script src="/js/jquery-1.11.1.min.js" type="text/javascript"></script>