html 
{
overflow-y: auto;
overflow-x: hidden;
}
body 
	{
	background-color: #000000;
	margin: 0px
	}

#horizon        
	{
	text-align: center;
	position: absolute;
	top: 50%;
	left: 0px;
	width: 100%;
	overflow: visible;
	visibility: visible;
	display: block
	}

#content    
	{
	margin-left: -450px;
	position: absolute;
	top: -270px;
	left: 50%;
	width: 900px;
	height: 540px;
	visibility: visible;
	}