.blablabla {
	z-index:200; 
	position: fixed;
	background: url(overlay.png); 
	width: 100%;
	height: 100%;
	max-height: 100%;
}



.smal_window {
	z-index:251;
	position:fixed;
	left:50px;
	width:400px;
	height:200px;
	display:none;
	top:10px;
	
}