// Using multiple unit types within one animation.
			$(document).ready(function(){
			$("#ph_plus").click(function(){
					$("#photo_tour_on").slideDown("slow");
					$('#photo_tour_off').removeClass("bg_ph_bot_off");
					$('#photo_tour_off').addClass("bg_ph_bot_on");
			});
			$("#ph_min").click(function(){
					$("#photo_tour_on").slideUp("slow");	
					$('#photo_tour_off').removeClass("bg_ph_bot_on");
					$('#photo_tour_off').addClass("bg_ph_bot_off");			
			});			
		});