​x
 
<html>
<head>
<style>
a
{
color:black;
height:25;
font:bold;
text-decoration:none;
}
</style>
<script type="text/javascript">
var i
function dropshadow()
{
i=0
interval=setInterval("makedropshadow(myLink)",10)
}
​
function back()
{
clearInterval(interval)
document.getElementById('myLink').style.filter=false
}
​
function makedropshadow()
{
i++
if (i<7)
    {
    document.getElementById('myLink').style.filter="dropshadow(offx=" + i + ")"
    document.getElementById('myLink').style.filter="dropshadow(offy=" + i + ")"
    }
else if (window.interval)
    {
    clearInterval(interval)
    }
}
</script>
</head>
​
<body>
<a href="/index.html" id="myLink" onmouseover="dropshadow()" onmouseout="back()">请把鼠标移动到链接上</a>
</body>
​
</html>
​