var MC_isNS = (navigator.appName == "Netscape");
  var MC_layerRef = (MC_isNS) ? "document" : "document.all";
  var MC_styleRef = (MC_isNS) ? "" : ".style";
  var MC_currentContent = ""

  function MC_HiddenAll()
  {

    if(MC_currentContent != "")
      MC_hideMenu(MC_currentContent);
    MC_currentContent = "";
    
  }     


  function MC_OnButton(linkref)
  {

    if(MC_currentContent != "")
      MC_hideMenu(MC_currentContent);
    MC_currentContent = linkref;
    MC_showMenu(linkref); 
    
    
  }     

  function MC_showMenu(layerID) {

    eval(MC_layerRef + '["' + layerID + '"]' + MC_styleRef + '.visibility = "visible"');
    
   
  }

  function MC_hideMenu(layerID) {
    eval(MC_layerRef + '["' + layerID + '"]' + MC_styleRef + '.visibility = "hidden"');
  }