js格式化顯示目前時間

<script type="text/javascript">

//    function settime() {

//        var mytime = document.getElementByIdx_x_x("mytime");

//        var time = new Date();

//        var text = time.toString();

//        mytime.innerHTML = text;

//       // alert(time);

//    }

//    setInterval(settime, 1000);

  //  settime();

    function showTime() {

        var temp = "";

        var week = new Array("星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六")//0代表星期天，1代表星期一

        var timeNow = new Date();

        var h = timeNow.getHours();

        var s = timeNow.getSeconds();

        var m = timeNow.getMinutes();

        var year = timeNow.getYear();

        var month = timeNow.getMonth() + 1;              //傳回0-11

        var i = timeNow.getDay()

        var xingqi = week[i];

        var day = timeNow.getDate();               //傳回1-31

        if (h < 10) h = "0" + h;

        if (m < 10) m = "0" + m;

        if (s < 10) s = "0" + s;

        temp = "現在是：" + year + "年" + month + "月" + day + "日 " + xingqi + " " + h + ":" + m + ":" + s;

        mytime.innerHTML = temp; //mytime為頁面元素的一個id号

        //var t=setTimeout("showTime()",1000);

    }

    setInterval(showTime, 1000);

</script>

<span id="mytime"></span>