Date.prototype.format =function(format)

{

    var o = {

            "M+" : this.getMonth()+1, //month

            "d+" : this.getDate(), //day

            "h+" : this.getHours(), //hour

            "m+" : this.getMinutes(), //minute

            "s+" : this.getSeconds(), //second

            "q+" : Math.floor((this.getMonth()+3)/3), //quarter

            "S" : this.getMilliseconds() //millisecond

    };

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

    {

        format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4- RegExp.$1.length));

    }

    for(var k in o)

    {

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

        {

            format = format.replace(RegExp.$1,RegExp.$1.length==1? o[k] :("00"+ o[k]).substr((""+ o[k]).length));

        }

    }

    return format;

};