// ===============
   // Preload Images:
   // ===============
   
   if (document.images)
   {
      img_mortgages_on = new Image();
      img_mortgages_on.src = "img/header/img-tab-mortgages-on.gif";
   
      img_mortgages_off = new Image();
      img_mortgages_off.src = "img/header/img-tab-mortgages-off.gif";
      
      img_business_on = new Image();
      img_business_on.src = "img/header/img-tab-business-on.gif";
   
      img_business_off = new Image();
      img_business_off.src = "img/header/img-tab-business-off.gif";
      
      img_personal_on = new Image();
      img_personal_on.src = "img/header/img-tab-personal-on.gif";
   
      img_personal_off = new Image();
      img_personal_off.src = "img/header/img-tab-personal-off.gif";
      
      img_property_on = new Image();
      img_property_on.src = "img/header/img-tab-property-on.gif";
   
      img_property_off = new Image();
      img_property_off.src = "img/header/img-tab-property-off.gif";
            
      img_contactus_on = new Image();
      img_contactus_on.src = "img/header/img-tab-contactus-on.gif";
   
      img_contactus_off = new Image();
      img_contactus_off.src = "img/header/img-tab-contactus-off.gif";
     
   }
   
   // =====================
   // Image Swap Functions:
   // =====================   
  
   function imgOn(img)
   {
      if (document.images)
      {
         document.images[img].src = eval("img_" + img + "_on.src");
      }
   }
   
   function imgOff(img)
   {
      if (document.images)
      {
         document.images[img].src = eval("img_" + img + "_off.src");
      }
   }