<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>特效时钟</title>
</head>
<body>
<div id="myblock"></div>
<script type="text/javascript">
function mytime(){
var time=new Date();
var hh=time.getHours();
var mm=time.getMinutes();
var ss=time.getSeconds();
document.getElementById("myblock").innerHTML="现在是"+hh+"："+mm+":"+ss;
}
var my=setInterval("mytime()",1000)
</script>
<input type="button" value="取消" onclick="javascript:clearInterval(my)">
</body>
</html>