#og_1 { 
	width:499px;
	height:425px;
	position:absolute;
	background-image:url(../images/og_operations_1.jpg);
	margin:0 auto;
	}	
	
#og_2 { 
	width:499px;
	height:425px;
	position:absolute;
	background-image:url(../images/og_operations_2.jpg);
	margin:0 auto;
	}	
	
#og_3 { 
	width:499px;
	height:425px;
	position:absolute;
	background-image:url(../images/og_operations_3.jpg);
	margin:0 auto;
	}