.overlay{
	position: absolute;
} 
.dark-overlay{
	background-color: rgba(0,0,0,0.7);
}
.filmgrain-overlay{
	background-image: url('../images/overlay/filmgrain.gif');
	background-repeat: repeat;
	opacity: 0.3;
}
.dotgrain-overlay{
	background-image: url('../images/overlay/dotgrain.gif');
	background-repeat: repeat;
	opacity: 0.1;
}