Date扩展
格式化

Date.prototype.format = function(format){    /*     * eg:format="yyyy-MM-dd hh:mm:ss";     */    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;};