function selbox(bpref, id_max, selected) {
  if (! document.getElementById) return;
  for (i = 0; i <= id_max; i++) {
    if (! document.getElementById(bpref + i)) continue;
    if (i == selected) {
      document.getElementById(bpref + i).style.visibility = "visible";
      document.getElementById(bpref + i).style.display = "block";
      document.getElementById("defo").style.visibility = "hidden";
      document.getElementById("defo").style.display = "none";
	  document.getElementById("climg" + i).src="../images/map/on_"+ i +".gif";
    } else {
      document.getElementById(bpref + i).style.visibility = "hidden";
      document.getElementById(bpref + i).style.display = "none";
      document.getElementById("defo").style.visibility = "hidden";
      document.getElementById("defo").style.display = "none";
	  document.getElementById("climg" + i).src="../images/map/off_"+ i +".gif";
    }
  }
}