if (document.images) {
          var logo = new Image(); 
          logo.src = "images/index/logo_header.gif";
          var fine_art = new Image(); 
          fine_art.src = "images/index/fine_art.gif";
          var fine_art_roll = new Image(); 
          fine_art_roll.src = "images/index/fine_art_roll.jpg";
          var illustration = new Image(); 
          illustration.src = "images/index/illustration.jpg";
          var illustration_roll = new Image(); 
          illustration_roll.src = "images/index/illustration_roll.jpg";
          var printed = new Image(); 
          printed.src = "images/index/printed.gif";
          var printed_roll = new Image(); 
          printed_roll.src = "images/index/printed_roll.jpg";
          var web_design = new Image(); 
          web_design.src = "images/index/web_design.jpg";
          var web_design_roll = new Image(); 
          web_design_roll.src = "images/index/web_design_roll.jpg";
          var marketing = new Image(); 
          marketing.src = "images/index/marketing.jpg";
          var marketing_roll = new Image(); 
          marketing_roll.src = "images/index/marketing_roll.jpg";
        }

        function MouseOver(imgName) {
          if (document.images)
            document.images[imgName].src = eval(imgName + "_roll.src");   
        }

        function MouseOut(imgName) {
          if (document.images)
            document.images[imgName].src = eval(imgName + ".src");
        }