function show_content(content){
	switch (content){
		case 0:
			display('cup_content_0', 'show');
			display('cup_content_1', 'hide');
			display('cup_content_2', 'hide');
			display('cup_content_3', 'hide');
		break;
		case 1:
			display('cup_content_0', 'hide');
			display('cup_content_1', 'show');
			display('cup_content_2', 'hide');
			display('cup_content_3', 'hide');
		break;
		case 2:
			display('cup_content_0', 'hide');
			display('cup_content_1', 'hide');
			display('cup_content_2', 'show');
			display('cup_content_3', 'hide');
		break;
		case 3:
			display('cup_content_0', 'hide');
			display('cup_content_1', 'hide');
			display('cup_content_2', 'hide');
			display('cup_content_3', 'show');
		break;
	}
}

function display(elm, action){
	switch (action){
		case 'toggle':
			if ($(elm).getStyle('visibility') != 'hidden'){
				display(elm, 'hide');
			}
			else{
				display(elm, 'show');
			}
		break;
		case 'show':
			$(elm).setStyle('visibility', 'visible');
			$(elm).setStyle('display', 'block');
		break;
		case 'hide':
			$(elm).setStyle('visibility', 'hidden');
			$(elm).setStyle('display', 'none');
		break;
		default:
			display(elm, 'show');
		break;
	}
}