Dont think you use the image but I know that you can use CSS to change te look of a hyperlink.
<style type="text/css">
a:link {color: #FF0000}
a:visited {color: #00FF00}
a:hover {color: #FF00FF}
a:active {color: #0000FF}
</style>
put that into the head section.
There are lots to play with like colours/fonts/text decloration/stlye. So you might want to read up on it.
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or there is DHTML. (Dynamic Hyper Markup Language)
You can change the image to go from a alpha to its original colour.
<style>
img
{
filter:alpha(opacity=10)
}
</style>
<script type="text/javascript">
function clean()
{
interval=setInterval("makeclean(myImage)",10)
}
function foggy()
{
clearInterval(interval)
document.getElementById('myImage').filters.alpha.opacity=10
}
function makeclean()
{
if (document.getElementById('myImage').filters.alpha.opacity<100)
{
document.getElementById('myImage').filters.alpha.opacity+=5
}
else if (window.interval)
{
clearInterval(interval)
}
}
</script>
put that into the head section again.
And to call it up use this piece of code in the body.
<img id="myImage" src="FILENAME" onmouseover="clean()" onmouseout="foggy()" width="160" height="120">
"Is it really good is a hoover sucks?"