if (document.../images)
    {
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "../images/Button-MalkoJob1-O.jpg";
      image_url[1] = "../images/Button-MalkoJob2-O.jpg";
      image_url[2] = "../images/Button-MalkoJob3-O.jpg";
      image_url[3] = "../images/Button-Contact-O.jpg";
      image_url[4] = "../images/Button-Service-O.jpg";
      image_url[5] = "../images/Button-Upgrades-O.jpg";
      image_url[6] = "../images/Button-Projects-O.jpg";
      image_url[7] = "../images/Button-Area-O.jpg";
 			image_url[8] = "../images/Button-About-O.jpg";
      image_url[9] = "../images/Button-Home-O.jpg";
       var i = 0;
       for(i=0; i<=3; i++) 
         preload_image_object.src = image_url[i];
    }