var chatWindow;
function openChat() {
	var w = screen.width;
	w = (w > 0) ? w - 60 : 600;
	w = (w > 1000) ? 1000 : w;

	var h = screen.height;
	h = (h > 0) ? h - 60 : 400;
	h = (h > 800) ? 800 : h;
	
	chatWindow = window.open('/chat/modules/chatrooms/index.php', 'UChat', 'width=' + w + ',height=' + h + ',top=30,left=30,menubar=no,toolbar=no,location=no,status=no,resizable=yes,scrollbars=no');
	chatWindow.focus();
	chatWindow.chatroom(id);
}