<!--
function hideInfo(layerID) {
  if (document.getElementById) {
    var layerObj=document.getElementById(layerID);
   layerObj.style.visibility='hidden';
 } else if (document.all) {  // object detection for IE4
   document.all[layerID].style.visibility='hidden';
 } else if (document.layers) {  // object detection for NS4
   document.layers[layerID].visibility='hidden';
 } // no else branch, but some action might be in order for other
   // browsers...
}
function displayInfo(layerID) {
 if (document.getElementById) {  // object detection for IE5 and NS6
   var layerObj=document.getElementById(layerID);
   layerObj.style.visibility='visible';
 } else if (document.all) {  // object detection for IE4
   document.all[layerID].style.visibility='visible';
 } else if (document.layers) {  // object detection for NS4
   document.layers[layerID].visibility='show';
 } // no else branch, but some action might be in order for other
   // browsers...
}
-->