function map_event(id,obj,over){
	var oImage = document.getElementById("gmap_img");
	var oDescr = document.getElementById("gmap_descr");
	if(over){
		oImage.src = "./img/map."+id+".gif";
		oDescr.innerHTML = obj.alt;
	}else{
		oImage.src = "./img/map.gif";
		oDescr.innerHTML = " ";
	}
}