if (document.images) {
   whymylanOn = new Image();
   whymylanOn.src = "/images/header/nav/why_mylan_on.gif";
   joinmylanOn = new Image();
   joinmylanOn.src = "/images/header/nav/join_mylan_on.gif";
   faqOn = new Image();
   faqOn.src = "/images/header/nav/how_to_apply_on.gif";
   faqNewOn = new Image();
   faqNewOn.src = "/images/header/nav/faq_new_on.gif";
   
   
   whymylanOff = new Image();
   whymylanOff.src = "/images/header/nav/why_mylan_off.gif";
   joinmylanOff = new Image();
   joinmylanOff.src = "/images/header/nav/join_mylan_off.gif";
   faqOff = new Image();
   faqOff.src = "/images/header/nav/how_to_apply_off.gif";
   faqNewOff = new Image();
   faqNewOff.src = "/images/header/nav/faq_new_off.gif";
}


function swapImage(imgName,newImage) {
   if (document.images) {
      eval('document.' + imgName + '.src = ' + newImage + '.src');
   }
}