Hola seoista:
Creo que esto te puede valer.
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<html>
<head>
<style type="text/css">
#im {
FILTER: alpha(opacity=50)
}
</style>
<title></title>
<script language="JavaScript1.2">
function high(which2)
{
theobject=which2;
highlighting=setInterval("highlightit(theobject)", 50);
}
function low(which2)
{
clearInterval(highlighting);
which2.filters.alpha.opacity=50;
}
function highlightit(cur2)
{
if(cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=5
else if(window.highlighting)
clearInterval(highlighting)
}
</script>
</head>
<body>
<p><img src="01.gif" width="130" height="51" alt id="im" onmouseover="high(this)"
onmouseout="low(this)"> </p>
</body>
</html>
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Saludos y al resto de foreros.