<script>
var global = window.document
global.fo_shadows = new Array
function makeRectangularDropShadow(el, color, size)
{
var i;
for (i=size; i>0; i--)
{
var rect = document.createElement('div');
var rs = rect.style
rs.position = 'absolute';
rs.left = (el.style.posLeft + i) + 'px';
rs.top = (el.style.posTop + i) + 'px';
rs.width = el.offsetWidth + 'px';
rs.height = el.offsetHeight + 'px';
rs.zIndex = el.style.zIndex - i;
rs.backgroundColor = color;
var opacity = 1 - i / (i + 1);
rs.filter = 'alpha(opacity=' + (100 * opacity) + ')';
el.insertAdjacentElement('afterEnd', rect);
global.fo_shadows[global.fo_shadows.length] = rect;
}
}
</script>
<style>body,td,div,a,input{font:menu;line-height:180%}</s

tyle>
<div id=menu style="position:absolute; left: 10px; top:

10px; background: #EEEEEE; width: 200px; height: 100px;

padding: 3px; border: 1 #999999 solid; cursor: default">

<div style="border: 1 solid #EEE"
onmouseover="this.style.background='#CCC';

this.style.borderColor='#999'"
onmouseout ="this.style.background='#EEE';

this.style.borderColor='#EEE'"
>shadow Menu</div>

<div style="border: 1 solid #EEE"
onmouseover="this.style.background='#CCC';

this.style.borderColor='#999'"
onmouseout ="this.style.background='#EEE';

this.style.borderColor='#EEE'"
>shadow Menu</div>

<div style="border: 1 solid #EEE"
onmouseover="this.style.background='#CCC';

this.style.borderColor='#999'"
onmouseout ="this.style.background='#EEE';

this.style.borderColor='#EEE'"
>shadow Menu</div>

<div style="border: 1 solid #EEE"
onmouseover="this.style.background='#CCC';

this.style.borderColor='#999'"
onmouseout ="this.style.background='#EEE';

this.style.borderColor='#EEE'"
>shadow Menu</div>

<div style="border: 1 solid #EEE"
onmouseover="this.style.background='#CCC';

this.style.borderColor='#999'"
onmouseout ="this.style.background='#EEE';

this.style.borderColor='#EEE'"
>shadow Menu</div>

<div style="border: 1 solid #EEE"
onmouseover="this.style.background='#CCC';

this.style.borderColor='#999'"
onmouseout ="this.style.background='#EEE';

this.style.borderColor='#EEE'"
>shadow Menu</div>

</div>

<script>
makeRectangularDropShadow(document.all["menu"],

"#666666", 4);
</script>

(DVOL本文转自：中国DV传媒 http://www.dvol.cn)