#boxbg {
	position: fixed;
	z-index:100;
	top: 0px;
	left: 0px;
	height:100%;
	width:100%;
	background-color:#666;
	filter:alpha(opacity=75);
	-moz-opacity: 0.75;
	opacity: 0.75;
}
* html #boxbg { /* ie6 hack */
     position: absolute;
     height: expression(document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + 'px');
}

#boxwindow {
	position: fixed;
	background: #ffffff;
	z-index: 102;
	color:#000000;
	border: 2px solid #525252;
	padding:5px;
	top:50%;
	left:50%;
}

* html #boxwindow { /* ie6 hack */
position: absolute;
margin-top: expression(0 - parseInt(this.offsetHeight / 2) + (TBWindowMargin = document.documentElement && document.documentElement.scrollTop || document.body.scrollTop) + 'px');
}

#boxwindow iframe { border:0; }