js DateFormat

<pre name="code" class="javascript">/*
v3. Date format
for example:
alert(new Date().format("yyyy-MM-dd"));
alert(new Date().format("yyyyMMddhhmmss")); 
alert(new Date("january 12 2008 11:12:30").format("yyyy-MM-dd hh:mm:ss"));
*/
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;
};

使用：

var date = new Date.format(yyMMddhhmmssS);