<style>
#flt
{
FILTER:PROGID:DXIMAGETRANSFORM.MICROSOFT.WAVE
(
strength = 5,
freq = 1,
lightstrength = 20,
add = 0,
phase = 0
);

width: 150px;
height: 150px;
text-align: center;
color: #fff;
font-Family: Corier New;
font-size: 50px;
background-color: silver;
}
</style>

<div id="flt"><br>BG</div>

<script type='text/javascript'>
var d = document.getElementById('flt');
var i = 0;

function flag()
{
if (i == 100) i = 0;

d.filters[0].phase = ++i;
setTimeout("flag()",3);
}

flag();
</script>