.cover_class_bg_color {	
	position: absolute;
	top: 0px;
	left: 0px;
	width:0px;
	height:0px;
	z-index:998;
	background-color:#000;
	filter:alpha(opacity=85);
	-moz-opacity:0.85;
	-khtml-opacity: 0.85;
	opacity: 0.85;	
}