function PreLoader()
{
if (document.images) 
{
   img1 = new Image();
   img2 = new Image();
   img3 = new Image();
   img4 = new Image();
   img5 = new Image();
   img6 = new Image();
   img7 = new Image();

   img1.src = "/Common/Img/DefMainBanner.png";
   img2.src = "/Common/Img/StaffMainBanner.png";
   img3.src = "/Common/Img/ProMainBanner.png";
   img4.src = "/Common/Img/OfficeMainBanner.png";
   img5.src = "/Common/Img/PreRegMainBanner.png";
   img6.src = "/Common/Img/LinksMainBanner.png";
   img7.src = "/Common/Img/PhySerMainBanner.png";

}
}