if (document.images) {    //check browser
  
  applicationson = new Image();  //preload active images for side navigation
  applicationson.src = "../images/global/nav_applications_f2.jpg";
  serviceson = new Image();
  serviceson.src = "../images/global/nav_services_f2.jpg";
  processon = new Image();  
  processon.src = "../images/global/nav_process_f2.jpg";
  companyon = new Image();
  companyon.src = "../images/global/nav_company_f2.jpg";

  
  applicationsoff = new Image();  //preload active images for side navigation
  applicationsoff.src = "../images/global/nav_applications.jpg";
  servicesoff = new Image();
  servicesoff.src = "../images/global/nav_services.jpg";
  processoff = new Image();  
  processoff.src = "../images/global/nav_process.jpg";
  companyoff = new Image();
  companyoff.src = "../images/global/nav_company.jpg";

   }
   
   //Function to 'activate' images.
function imgOn(imgName) {
   if (document.images) {
       document[imgName].src = eval(imgName + "on.src");
   }
}

//Function to 'deactive' images.
function imgOff(imgName)  {
         if (document.images) {
             document[imgName].src = eval(imgName + "off.src");
          }
}