function list(id) {
	var id_s = id + "_s" ;
 if (document.getElementById(id_s).style.display == "block"){
	document.getElementById(id).style.background="#FFFFFF url(./img/menu/side_map_into.gif) 10px 0px no-repeat";
	document.getElementById(id_s).style.display="none";
	} else {
	document.getElementById(id).style.background="url(./img/menu/side_map_active.gif) 10px 0px no-repeat";
	document.getElementById(id_s).style.display="block";
	}
}