静态显示：
<html><body><center>
Now time is: <%=new java.util.Date()%>
</center></body></html>
动态显示：
<html><head><title></title>
<script type=text/javascript>
var myVar=setInterval(function () {myTimer()}, 1000);
var counter = 0;
function myTimer() {
var date = new Date();
document.getElementById(demo).innerHTML = date.toLocaleString();
}
</script></head><body><center>
<span id=demo></span>
</center></body></html>