var current_screen = 1;
	var screen_id = 1;
	var active_button = "/assets/images/c-black.gif";
	var inactive_button = "/assets/images/c-blank.gif";
	var total_screens = 5;

function SwitchPrevious() {


	if (current_screen==1) {
		next_screen = total_screens;
	} else {
		next_screen = current_screen - 1;
	}
	
	SwitchScreen(next_screen);
	
}

function SwitchNext() {

	if (current_screen==total_screens) {
		next_screen = 1;
	} else {
		next_screen = current_screen + 1;
	}
	
	SwitchScreen(next_screen);
}

function SwitchScreen(screen_id) {

	if (screen_id != current_screen) {


		// ## Switch it!

		// Switch buttons
		$("#button_id"+current_screen).attr({src: inactive_button});
		$("#button_id"+screen_id).attr({src: active_button});
		
		// Switch URLs 
		// $(this).attr({scr: active_button});

		// Switch screens
		$("#screen_id"+current_screen).hide();
		$("#screen_id"+screen_id).fadeIn("slow");
		
		// Switch info
		$("#info_id"+current_screen).hide();
		$("#info_id"+screen_id).fadeIn("slow");
		
		// Save current screen id
		current_screen = screen_id;
		
	}
	
}