var zoom = 2;
function zoom_map() {
	document.getElementById('map').src='/images/map_l'+zoom+'.gif';
	zoom = zoom+1;
	if(zoom == 4) {
		document.getElementById('map').useMap= '#Mapz';
		zoom = 1;
	}
	else {
		document.getElementById('map').useMap= '#xxx';
	}

	return false;
}

function show_bubble() {
	if(zoom == 1) 
	document.getElementById('bubble').style.display='block';
}

function hide_bubble() {
	document.getElementById('bubble').style.display='none';
}