Så fik jeg lavet en, som er uafhængig af antal images og browser (hvis de ikke er for gamle, sæ'fø'li'-)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"
http://www.w3.org/TR/html4/loose.dtd"><html>
<head>
<title>Opacity</title>
<META NAME="Generator" CONTENT="Stone's WebWriter 3.5">
<script language="javascript" type="text/javascript">
var OpC = new Array();
var endOpC = new Object();
var ie = (document.all)?true:false;
var moz = (navigator.userAgent.indexOf("Gecko")>-1)
function startOpChange(elm,end,tim){
if (!ie && !moz)return;
var idx = OpC.length;
for(var i=0;idx>i;i++){
if(OpC[i][0]==elm){
clearInterval(OpC[i][4]);
idx = i;
break;
}
OpC[idx] = new Array();
}
if(idx==0)OpC[idx] = new Array();
if(ie)actOp=elm.filters.alpha.opacity;
else actOp=(elm.style.MozOpacity*100);
if (actOp!=end){
OpC[idx][0]=elm;
OpC[idx][1]=actOp;
OpC[idx][2]=end;
OpC[idx][3]=(end>actOp)?1:-1;
var delayTime = Math.floor((tim*1000)/Math.abs((actOp-end)));
OpC[idx][4]=setInterval("opChange("+idx+")",delayTime);
}
}
function opChange(idx){
OpC[idx][1]+=OpC[idx][3];
if (ie)OpC[idx][0].filters.alpha.opacity=OpC[idx][1];
else OpC[idx][0].style.MozOpacity=OpC[idx][1]/100;
if (OpC[idx][1]==OpC[idx][2]){
clearInterval(OpC[idx][4]);
return;
}
}
</script>
</head>
<body>
<form>
<img src="../billede.jpg" width="100" height="100" name="fisk" style="filter:alpha(opacity=60);-moz-opacity:0.6;" onMouseOver="startOpChange(this,100,1);" onMouseOut="startOpChange(this,60,1);">
<img src="../billede.jpg" width="100" height="100" name="fisk" style="filter:alpha(opacity=60);-moz-opacity:0.6;" onMouseOver="startOpChange(this,100,1);" onMouseOut="startOpChange(this,60,1);">
</form>
</body>
</html>