Date.prototype.Format = function (fmt) {

    var o = {

        "M+": this.getMonth() + , //月份

        "d+": this.getDate(), //日

        "h+": this.getHours()%==?:this.getHours()%, //小时

        "H+": this.getHours(),

        "m+": this.getMinutes(), //分

        "s+": this.getSeconds(), //秒

        "q+": Math.floor((this.getMonth() + ) / ), //季度

        "f": this.getMilliseconds() //毫秒

    };

    if (/(y+)/.test(fmt))

    fmt = fmt.replace(RegExp.$, (this.getFullYear() + "").substr( - RegExp.$.length));

    for (var k in o)

    if (new RegExp("(" + k + ")").test(fmt))

        fmt = fmt.replace(RegExp.$, (RegExp.$.length == ) ? (o[k]) : (("" + o[k]).substr(("" + o[k]).length)));

    return fmt;

}

var time1 = new Date().Format("yyyy-MM-dd");

var time2 = new Date().Format("yyyy-MM-dd hh:mm:ss");

var time3 = new Date().Format("yyyy-MM-dd hh:mm:ss:f");

var time4=new Date().toLocaleString();

console.log(time1);

console.log(time2);

console.log(time3);

console.log(time4);

Date.prototype.format = function(formatStr)

{

    var str = formatStr;

    var Week = ['日','一','二','三','四','五','六'];  

    str=str.replace(/yyyy|YYYY/,this.getFullYear());

    str=str.replace(/yy|YY/,(this.getYear() % )>?(this.getYear() % ).toString():'' + (this.getYear() % ));

    //

    this.setMonth(this.getMonth()+);

    str=str.replace(/MM/,this.getMonth()>?this.getMonth().toString():'' + this.getMonth());

    str=str.replace(/M/g,this.getMonth());   

    str=str.replace(/w|W/g,Week[this.getDay()]);   

    str=str.replace(/dd|DD/,this.getDate()>?this.getDate().toString():'' + this.getDate());

    str=str.replace(/d|D/g,this.getDate());   

    str=str.replace(/hh|HH/,this.getHours()>?this.getHours().toString():'' + this.getHours());

    str=str.replace(/h|H/g,this.getHours());

    str=str.replace(/mm/,this.getMinutes()>?this.getMinutes().toString():'' + this.getMinutes());

    str=str.replace(/m/g,this.getMinutes());   

    str=str.replace(/ss|SS/,this.getSeconds()>?this.getSeconds().toString():'' + this.getSeconds());

    str=str.replace(/s|S/g,this.getSeconds()); 

    str=str.replace(/f/,this.getMilliseconds());

    return str;

}