function newImage(arg) 
     {
      if (document.images) 
       {
        rslt = new Image();
        rslt.src = arg;
        return rslt;
       }
     }

    function changeImages() 
     {
      if (document.images && (preloadFlag == true)) 
       {
        for (var i=0; i<changeImages.arguments.length; i+=2) 
         {
          document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
         }
       }
     }

    var preloadFlag = false;

    function preloadImages() 
     {
      if (document.images) 
       {
        om_2 = newImage("/images/buttons/om_2.gif");
        nyheter_2 = newImage("/images/buttons/nyheter_2.gif");
        prosjekter_2 = newImage("/images/buttons/prosjekter_2.gif");
        media_2 = newImage("/images/buttons/media_2.gif");
        kontakt_2 = newImage("images/buttons/kontakt_2.gif");
        f_pool_1 = newImage("/images/f_pool_1.jpg");
        f_pool_2 = newImage("/images/f_pool_2.jpg");
        f_pool_3 = newImage("/images/f_pool_3.jpg");
        f_pool_4 = newImage("/images/f_pool_4.jpg");
        f_pool_5 = newImage("/images/f_pool_5.jpg");
        f_pool_6 = newImage("/images/f_pool_6.jpg");
        preloadFlag = true;
       }
     }