#apDiv4 {
	position:absolute;
	left:18px;
	top:80px;
	width:700px;
	height:500px;
	z-index:1;
	visibility: visible;
	overflow: visible;
}
#apDiv5 {
	position:absolute;
	left:20px;
	top:80px;
	width:800px;
	height:500px;
	z-index:2;
	visibility: hidden;
}
#apDiv6 {
	position:absolute;
	left:20px;
	top:80px;
	width:700px;
	height:500px;
	z-index:3;
	visibility: hidden;
}