html, body {
	margin: 0; 
	padding: 0; 
	text-align: center;
	height: 100%; 
} 
div, span, td {
	text-align: left;
}
#screenWrapper { 
	text-align: center; 
	width: 900px; 
	height: 100%;  
	margin: 0 auto; 
	display: table; 
	/*border:2px solid green;*/
} 
#screenWrapper * {
	vertical-align: middle;
} 
#screenWrapperMiddle {
	display: table-cell; 
	width: 100%; 
} 
#screenWrapperContent {
	margin: 0 0px;
	width: 100%;
}