Date.prototype.format = function(fmt) {
    var o = {
        "M+" : this.getMonth()+1,                 //鏈堜唤
        "d+" : this.getDate(),                    //鏃
        "h+" : this.getHours(),                   //灏忔椂
        "m+" : this.getMinutes(),                 //鍒
        "s+" : this.getSeconds(),                 //绉
        "q+" : Math.floor((this.getMonth()+3)/3), //瀛ｅ害
        "S"  : this.getMilliseconds()             //姣
    };
    if(/(y+)/.test(fmt)) {
        fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));
    }
    for(var k in o) {
        if(new RegExp("("+ k +")").test(fmt)){
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));
        }
    }
    return fmt;
}