var currentLayer;
var menuTimeout;
var itemTimeout;

if (document.layers || document.all || document.getElementById) {
   //menuabout
   menuImgabout_1On = new Image();
   menuImgabout_2On = new Image();
   menuImgabout_3On = new Image();
   menuImgabout_4On = new Image();
   menuImgabout_1On.src = "/images/header/nav/subnav/about_overview_on.gif";
   menuImgabout_2On.src = "/images/header/nav/subnav/about_history_on.gif";
   menuImgabout_3On.src = "/images/header/nav/subnav/about_directions_on.gif";
   menuImgabout_4On.src = "/images/header/nav/subnav/about_declaration_on.gif";

   menuImgabout_1Off = new Image();
   menuImgabout_2Off = new Image();
   menuImgabout_3Off = new Image();
   menuImgabout_4Off = new Image();
   menuImgabout_1Off.src = "/images/header/nav/subnav/about_overview.gif";
   menuImgabout_2Off.src = "/images/header/nav/subnav/about_history.gif";
   menuImgabout_3Off.src = "/images/header/nav/subnav/about_directions.gif";
   menuImgabout_4Off.src = "/images/header/nav/subnav/about_declaration.gif";
   
	//menuTransdermal
   menuImgtransdermal_1On = new Image();
   menuImgtransdermal_2On = new Image();
   menuImgtransdermal_1On.src = "/images/header/nav/subnav/transdermal_products_on.gif";
   menuImgtransdermal_2On.src = "/images/header/nav/subnav/transdermal_technology_on.gif";   

   menuImgtransdermal_1Off = new Image();
   menuImgtransdermal_2Off = new Image();
   menuImgtransdermal_1Off.src = "/images/header/nav/subnav/transdermal_products.gif";
   menuImgtransdermal_2Off.src = "/images/header/nav/subnav/transdermal_technology.gif";   

	//menuComponent
   menuImgcomponent_1On = new Image();
   menuImgcomponent_2On = new Image();  
   menuImgcomponent_1On.src = "/images/header/nav/subnav/component_standard_on.gif";
   menuImgcomponent_2On.src = "/images/header/nav/subnav/component_custom_on.gif";   
   
   menuImgcomponent_1Off = new Image();
   menuImgcomponent_2Off = new Image();   
   menuImgcomponent_1Off.src = "/images/header/nav/subnav/component_standard.gif";
   menuImgcomponent_2Off.src = "/images/header/nav/subnav/component_custom.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);
}