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Date.prototype.format = function (fmt) { //author: meizz 
    var o = {
        "M+": this.getMonth() + 1, //月份 
        "d+": this.getDate(), //日 
        "h+": this.getHours(), //小时 
        "m+": this.getMinutes(), //分 
        "s+": this.getSeconds(), //秒 
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
        "S": this.getMilliseconds() //毫秒 
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
    if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}

String.prototype.format = function (args) {
	var result = this;
	if (arguments.length > 0) {
		if (arguments.length == 1 && typeof (args) == "object") {
			for (var key in args) {
				if (args[key] != undefined) {
					var reg = new RegExp("({" + key + "})", "g");
					result = result.replace(reg, args[key]);
				}
			}
		}
		else {
			for (var i = 0; i < arguments.length; i++) {
				if (arguments[i] != undefined) {
					var reg = new RegExp("({)" + i + "(})", "g");
					result = result.replace(reg, arguments[i]);
				}
			}
		}
	}
	return result;
};