bName = navigator.appName;
bVersion = parseInt(navigator.appVersion);
if ((bName == "Netscape" && bVersion >= 3) || (bName == "Microsoft Internet Explorer" && bVersion >= 4)) br = "aware";
else br = "unaware"; 

if (br== "aware") {
   aboutus_off = new Image();
   aboutus_off.src = "images/index_aboutus_off.jpg";
   aboutus_on = new Image();
   aboutus_on.src = "images/index_aboutus_on.jpg";

   services_off = new Image();
   services_off.src = "images/index_services_off.jpg";
   services_on = new Image();
   services_on.src = "images/index_services_on.jpg";

   projects_off = new Image();
   projects_off.src = "images/index_projects_off.jpg";
   projects_on = new Image();
   projects_on.src = "images/index_projects_on.jpg";

   resources_off = new Image();
   resources_off.src = "images/index_resources_off.jpg";
   resources_on = new Image();
   resources_on.src = "images/index_resources_on.jpg";

   feedback_off = new Image();
   feedback_off.src = "images/index_feedback_off.jpg";
   feedback_on = new Image();
   feedback_on.src = "images/index_feedback_on.jpg";

   contactus_off = new Image();
   contactus_off.src = "images/index_contactus_off.jpg";
   contactus_on = new Image();
   contactus_on.src = "images/index_contactus_on.jpg";

   dpow_off = new Image();
   dpow_off.src = "images/index_dpow_off.jpg";
   dpow_on = new Image();
   dpow_on.src = "images/index_dpow_on.jpg";

   demos_off = new Image();
   demos_off.src = "images/index_demos_off.jpg";
   demos_on = new Image();
   demos_on.src = "images/index_demos_on.jpg";

   offers_off = new Image();
   offers_off.src = "images/index_offers_off.jpg";
   offers_on = new Image();
   offers_on.src = "images/index_offers_on.jpg";

}
function imgAct(imgName) {
   if (br== "aware") {
      document.images[imgName].src=eval(imgName + "_on.src");
   }
}
function imgInact(imgName) {
   if (br== "aware") {
      document.images[imgName].src=eval(imgName + "_off.src");
   }
}