body
{
	padding: 0px;
	margin: 0;
}
div.full_screen
{
	position: absolute;
	overflow: auto;
	margin: 0;
	width: 100%;
	height: 100%;
}
div.center_400_400
{
	position: relative;
	left: 50%;
	width: 400px;
	margin-left: -200px;
	top: 50%;
	height: 400px;
	margin-top: -200px;
}