body {
	margin: 0;
	padding: 0;
 }

.contentCenter    
{
	width: 100%;
	height: 100%;
}

.contentTop
{
	width: 100%;
	height: 650px;
}

.contentLeft
{
	width: 900px;
	height: 100%;
}

.contentTopLeft
{
	width: 900px;
	height: 650px;
}