function toggle_visibility(id) {
  var e = document.getElementById(id);
  if (e.style.display == 'none') { e.style.display = 'block'; e.style.visibility = 'visible'; } else { e.style.display = 'none'; e.style.visibility = 'hidden'; }
}
function displayMap(id, height, width) {
  window.open('/assets/scripts/map.php?lid='+id,'','scrollbars=yes,menubar=no,height=' + height + ',width=' + width + ',resizable=yes,toolbar=no,location=no,status=no');
}