actually there is a way to do it using scripting.
I do it on my personal site (
check on the right side of the page. I actually use an API in JavaScript that I made to help me do it. But if you want here the snippet you'd really need to make it happen on your site :
<script>
// this function is a piece of the API just plug it in the top of your page
function Div(id)
{
var obj = false, type = typeof id;
if(typeof id == "string"

{
obj = xapi.dom ? document.getElementById(id) : document.all[id] ;
}
else if (type.indexOf("object"

!= -1)
{
obj = id;
}
if (!obj)
{
return false;
}
// special
obj.getOpacity = function()
{
/opacity=(\d{1,3})/i.test(obj.style.filter);
return (_ie) ? RegExp.$1 : parseInt(obj.style.MozOpacity) ;
}
obj.setOpacity = function(o)
{
if (xapi.moz)
{
obj.style.MozOpacity = o + "%";
}
else if (obj.style.filter)
{
obj.style.filter = 'alpha(opacity=' + o +')'
}
}
}
</script>
<img src="imgs/home.gif" id="homeIco" onmouseover="Div(this.id).setOpacity(100)" onmouseout="Div(this.id).setOpacity(50)" style="cursor

ointer;Moz-Opacity-:50%;filter:alpha(opacity=50);" width="32" height="25" alt="Go back home">
I just ripped this whole thing out of my site maybe I forgot a detail or something. Let me know if it works for you. Gary
Haran