See if this basic example helps ;)
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
.shadow{
border:1px solid silver;
font:10pt arial;
position:relative;
display:inline;
background:white;
z-index:100
}
.shadow_inner{
overflow:hidden;
position:absolute;
top: -1000px;
filter:alpha(Opacity=10); /*modify to change the shade solidity/opacity, same as below*/
opacity:0.1; /*firefox 1.5 opacity*/
-moz-opacity:0.1; /*mozilla opacity*/
-khtml-opacity:0.1; /*opacity*/
z-index:10
}
</style>
<script type="text/javascript">
var gradientshadow={}
gradientshadow.depth=6 //Depth of shadow in pixels
gradientshadow.containers=[]
gradientshadow.create=function(){
var a = document.all ? document.all : document.getElementsByTagName('*')
for (var i = 0;i < a.length;i++) {
if (a[i].className == "shadow") {
for (var x=0; x<gradientshadow.depth; x++){
var newSd = document.createElement("DIV")
newSd.className = "shadow_inner"
newSd.id="shadow"+gradientshadow.containers.length+"_"+x //Each shadow DIV has an id of "shadowL_X" (L=index of target element, X=index of shadow (depth)
if (a[i].getAttribute("rel"))
newSd.style.background = a[i].getAttribute("rel")
else
newSd.style.background = "black" //default shadow color if none specified
document.body.appendChild(newSd)
}
gradientshadow.containers[gradientshadow.containers.length]=a[i]
}
}
gradientshadow.position()
window.onresize=function(){
gradientshadow.position()
}
}
gradientshadow.position=function(){
if (gradientshadow.containers.length>0){
for (var i=0; i<gradientshadow.containers.length; i++){
for (var x=0; x<gradientshadow.depth; x++){
var shadowdiv=document.getElementById("shadow"+i+"_"+x)
shadowdiv.style.width = gradientshadow.containers[i].offsetWidth + "px"
shadowdiv.style.height = gradientshadow.containers[i].offsetHeight + "px"
shadowdiv.style.left = gradientshadow.containers[i].offsetLeft + x + "px"
shadowdiv.style.top = gradientshadow.containers[i].offsetTop + x + "px"
}
}
}
}
if (window.addEventListener)
window.addEventListener("load", gradientshadow.create, false)
else if (window.attachEvent)
window.attachEvent("onload", gradientshadow.create)
else if (document.getElementById)
window.onload=gradientshadow.create
</script>
</head>
<body>
<div class="shadow" rel="blue">
<img src="http://img201.imageshack.us/img201/7907/streetkz4.gif" /><br />
</div>
<br/>
<div class="shadow" rel="green" style="padding:4px;">
This is my second div
</div>
<br/><br/><br/>
<div class="shadow" rel="red" style="padding:4px;margin-top:20px;">
This is my third div
</div>
</body>
</html>