<html>
<script>
function Page_Load()
{
setTimeout("UpdatemyQQ()",1500);
}
function UpdatemyQQ()
{
document.all.myQQ.src="http://icon.qq.com/4480911/l/07/?"+Math.random();
setTimeout("UpdatemyQQ()",1500);
}
</script>
<body onload="Page_Load()">
<form>
<img src="http://icon.qq.com/4480911/l/07/" name="myQQ" id="myQQ" />
<form>
</body>
</html>
具体请参考
http://bbs.aspsky.net/dispbbs.asp?boardid=1&id=612050&star=1#498589