jQuery(document).ready(function(){
	
	jQuery("li.screenTwo").click(function() {
		jQuery("#screens").css("background-position","center -338px");return false;		
	});
	jQuery("li.screenOne").click(function() {
		jQuery("#screens").css("background-position","center top");return false;
		
	});
	jQuery("li.screenThree").click(function() {
		jQuery("#screens").css("background-position","center bottom");return false;
		
	});
});