asp.net Js里面用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,否则不认也就是这个js <script src="/js/jquery-1.11.1.min.js" type="text/javascript"></script>