#cover {
	width: 100%;
	background-color: #333333;
	position: absolute;
	left: 0px;
	top: 0px;
	visibility: hidden;
	opacity:0.75;
	filter:alpha(opacity=75);
	z-index: 998;
}
#box {
	position: absolute;
	width: 600px;
	top: 100px;
	z-index: 999;
	visibility: hidden;
	height: 300px;
}