html,body { height: 100%; margin: 0px; padding: 0px; }
body:not(.ios-device) { overflow: hidden;}

#contentFrame
{
	width:100%;
	height:100%;
	border:0px;
	margin:0px;
	padding:0px;
}

#returnButton {
    position: absolute;
}

#returnButton.top{
	top: 0;
}

#returnButton.bottom{
	bottom: 0;
}

#returnButton.left{
	left: 0;
}

#returnButton.right{
    right: 0;
}