function el(id){return document.getElementById(id);}

function showRoom(id)
{
	el('room_0').className = 'home_room_hidden';
	el('room_1').className = 'home_room_hidden';
	el('room_2').className = 'home_room_hidden';
	el('room_3').className = 'home_room_hidden';
	el('room_4').className = 'home_room_hidden';
	el('room_5').className = 'home_room_hidden';
	el('room_6').className = 'home_room_hidden';
	el(id).className = 'home_room_visible';
}