* html #modalBackground { /* ie6 hack */
     position: absolute;
     height: expression(document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + 'px');
}

#modalBackground
{
	position: fixed;
	z-index:9;
	top: 0px;
	left: 0px;
	height:100%;
	width:100%;
	background-color:#000;
	filter:alpha(opacity=75);
	opacity: 0.75;
	display: none;
}
#modalWindow
{
    position: absolute;
    left: 320px;
    top: 150px;
	z-index: 10;
	background-color: #E8E8E8;
	text-align: center;
	display: none;
	font-weight:bold;
	width: 350px;
	padding:20px;
}