在JS中如何把毫秒转换成规定的日期时间格式

 1 Date.prototype.toLocaleString = function() {
 2                               return this.getFullYear() + "-" + (this.getMonth() + 1) + "-" + this.getDate() + " " + this.getHours() + ":" + this.getMinutes() + ":" + this.getSeconds(); 2