if (document.images) {
   companyOn = new Image();
   companyOn.src = "/images/nav/company_on.gif";
   serviceOn = new Image();
   serviceOn.src = "/images/nav/service_on.gif";
   productsOn = new Image();
   productsOn.src = "/images/nav/products_on.gif";
   teamOn = new Image();
   teamOn.src = "/images/nav/team_on.gif";
   downloadsOn = new Image();
   downloadsOn.src = "/images/nav/downloads_on.gif";
   
   companyOff = new Image();
   companyOff.src = "/images/nav/products.gif";
   serviceOff = new Image();
   serviceOff.src = "/images/nav/about.gif";
   productsOff = new Image();
   productsOff.src = "/images/nav/service.gif";
   teamOff = new Image();
   teamOff.src = "/images/nav/team.gif";
   downloadsOff = new Image();
   downloadsOff.src = "/images/nav/downloads.gif";
}


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