document.getElementById('myLink').style.filter="wave(add=true, freq=1, lightstrength=3, phase=0, strength=" + i + ")"
<html>
<head>
<style>
a
{
color:black;
width:170;
font:bold;
text-decoration:none;
}
</style>
<script type="text/javascript">
var i
function wave()
i=0
interval=setInterval("makewave(myLink)",10)
function back()
clearInterval(interval)
document.getElementById('myLink').style.filter=false