var currentLayer;
var menuTimeout;
var itemTimeout;

if (document.layers || document.all || document.getElementById) {
    //menuPharmEx
   menuPharmEx_1On = new Image();
   menuPharmEx_2On = new Image();
   menuPharmEx_1On.src = "/images/header/nav/subnav/nav_october_on.gif";
   menuPharmEx_2On.src = "/images/header/nav/subnav/nav_contest_on.gif";
   
   menuPharmEx_1Off = new Image();
   menuPharmEx_2Off = new Image();
   menuPharmEx_1Off.src = "/images/header/nav/subnav/nav_october.gif";
   menuPharmEx_2Off.src = "/images/header/nav/subnav/nav_contest.gif";
   
    //menuMylInst
   menuMylInst_1On = new Image();
   menuMylInst_2On = new Image();
   menuMylInst_3On = new Image();
   menuMylInst_1On.src = "/images/header/nav/subnav/nav_overview_on.gif";
   menuMylInst_2On.src = "/images/header/nav/subnav/nav_ce_on.gif";
   menuMylInst_3On.src = "/images/header/nav/subnav/nav_exc_on.gif";

   menuMylInst_1Off = new Image();
   menuMylInst_2Off = new Image();
   menuMylInst_3Off = new Image();
   menuMylInst_1Off.src = "/images/header/nav/subnav/nav_overview.gif";
   menuMylInst_2Off.src = "/images/header/nav/subnav/nav_ce.gif";
   menuMylInst_3Off.src = "/images/header/nav/subnav/nav_exc.gif";
   
   
   //menuprofessionals
   menuGBR_1On = new Image();
   menuGBR_2On = new Image();
   menuGBR_3On = new Image();
   menuGBR_4On = new Image();
   menuGBR_5On = new Image();
   menuGBR_6On = new Image();
   menuGBR_1On.src = "/images/header/nav/subnav/nav_free_on.gif";
   menuGBR_2On.src = "/images/header/nav/subnav/nav_supp1_on.gif";
   menuGBR_3On.src = "/images/header/nav/subnav/nav_supp2_on.gif";
   menuGBR_4On.src = "/images/header/nav/subnav/nav_supp3_on.gif";
   menuGBR_5On.src = "/images/header/nav/subnav/nav_supp4_on.gif";
   menuGBR_6On.src = "/images/header/nav/subnav/nav_supp5_on.gif";

   menuGBR_1Off = new Image();
   menuGBR_2Off = new Image();
   menuGBR_3Off = new Image();
   menuGBR_4Off = new Image();
   menuGBR_5Off = new Image();
   menuGBR_6Off = new Image();
   menuGBR_1Off.src = "/images/header/nav/subnav/nav_free.gif";
   menuGBR_2Off.src = "/images/header/nav/subnav/nav_supp1.gif";
   menuGBR_3Off.src = "/images/header/nav/subnav/nav_supp2.gif";
   menuGBR_4Off.src = "/images/header/nav/subnav/nav_supp3.gif";
   menuGBR_5Off.src = "/images/header/nav/subnav/nav_supp4.gif";
   menuGBR_6Off.src = "/images/header/nav/subnav/nav_supp5.gif";
}

function showLayer(div) {
   if (document.layers) {
      eval('document.layers["' + div + '"].visibility = "visible";');
   } else if (document.all) {
      document.all[div].style.visibility = "visible";
   } else if (document.getElementById) {
      document.getElementById(div).style.visibility = "visible";
   }
}

function hideLayer(div) {
   if (document.layers) {
      eval('document.layers["' + div + '"].visibility = "hidden";');
   } else if (document.all) {
      document.all[div].style.visibility = "hidden";
   } else if (document.getElementById) {
      document.getElementById(div).style.visibility = "hidden";
   }
}

function menuOn(div) {
   if (document.layers || document.all || document.getElementById) {
      if (currentLayer) {
         if (menuTimeout) clearTimeout(menuTimeout);
         if (itemTimeout) clearTimeout(itemTimeout);
         hideLayer(currentLayer);
      }
      showLayer(div);
      currentLayer = div;
   } else {
      swapImage('menu',div);
   }
}

function menuOff(div) {
   if (document.layers || document.all || document.getElementById) {
      menuTimeout = setTimeout('hideLayer(currentLayer)',600);
   } else {
      swapImage('menu','dots');
   }
}

function keepAlive(div) {
   if (menuTimeout) clearTimeout(menuTimeout);
   if (itemTimeout) clearTimeout(itemTimeout);
   showLayer(div);
}

function killIt(div) {
   itemTimeout = setTimeout('hideLayer(currentLayer)',600);
}