<div id="showtime"></div>
<script type="text/javascript">
function ymdhis() {
var obj = new Date();
var y = obj.getFullYear();
var m = obj.getMonth() + 1;
var d = obj.getDate();
var dayOfWeek = obj.getDay();
var h = obj.getHours();
var i = obj.getMinutes();
var s = obj.getSeconds();
if (m < 10) m = "0" + m;
if (d < 10) d = "0" + d;
if (h < 10) h = "0" + h;
if (i < 10) i = "0" + i;
if (s < 10) s = "0" + s;
var arr_week = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");
var time = "现在时间是:" + y + '年' + m + '月' + d + '日' + ' ' + h + ':' + i + ':' + s + " " + arr_week[dayOfWeek];
document.getElementById("showtime").innerHTML = time;
setTimeout(ymdhis, 1000);
}
ymdhis();
</script>