js格式化时间

<script type="text/javascript">
Date.prototype.Format = function(fmt) { //author: meizz
var o = {
"M+": this.getMonth() + 1, //月份
"d+": this.getDate(), //日
"h+": this.getHours(), //小时
"m+": this.getMinutes(), //分
"s+": this.getSeconds(), //秒
"q+": Math.floor((this.getMonth() + 3) / 3), //季度
"S": this.getMilliseconds() //毫秒
};
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;
}
var time = new Date().Format('yyyy/MM/dd hh:mm:ss');
var time2 = new Date().Format('yyyy-MM-dd hh:mm:ss');
console.log(time);
console.log(time2)
</script>