JavaScript日期格式转换工具

Date.prototype.format = function(format) {
		var args = {
			"M+": this.getMonth() + 1,
			"d+": this.getDate(),
			"h+": this.getHours(),
			"m+": this.getMinutes(),
			"s+": this.getSeconds(),
		};
		if (/(y+)/.test(format))
			format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
		for (var i in args) {
			var n = args[i];
		 if (new RegExp("(" + i + ")").test(format))
				format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? n : ("00" + n).substr(("" + n).length));
		}
		return format;
	};

使用方法：new Date().format("yyyyMMddhhmmss")