#nav iframe {
	position:absolute;
	left:-9999px;
	top:0; 
	width:0; 
	height:0; 
	margin:0; 
	padding:0;
}

#nav :hover iframe {
	left:expression(this.nextSibling.offsetLeft);
	top:expression(this.nextSibling.offsetTop);
	width:expression(this.nextSibling.offsetWidth);
	height:expression(this.nextSibling.offsetHeight); 
	filter: alpha(opacity:0);
}