if (document.images)
    {
      preload_image_object = new Image();

      image_url = new Array();
      image_url[0] = "images/menu1.jpg";
      image_url[1] = "http://mydomain.com/image1.gif";
      image_url[2] = "http://mydomain.com/image2.gif";
      image_url[3] = "http://mydomain.com/image3.gif";

       var i = 0;
       for(i=0; i<=10; i++) 
         preload_image_object.src = 'images/menupl/menu'+i+'.jpg';
		 preload_image_object.src = 'images/menupl/menu'+i+'a.jpg';
         preload_image_object.src = 'images/menuen/menu'+i+'.jpg';
		 preload_image_object.src = 'images/menuen/menu'+i+'a.jpg';
         preload_image_object.src = 'images/menude/menu'+i+'.jpg';
		 preload_image_object.src = 'images/menude/menu'+i+'a.jpg';
    }