if (document.images)
    {
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "<?php echo $this->escape($this->imgDir); ?>/menu-manufacturers2.gif";
      image_url[1] = "<?php echo $this->escape($this->imgDir); ?>/menu-cantfind2.gif";
      image_url[2] = "<?php echo $this->escape($this->imgDir); ?>/menu-home-hover.gif";
      image_url[3] = "<?php echo $this->escape($this->imgDir); ?>/menu-aboutus-hover.gif";
      image_url[4] = "<?php echo $this->escape($this->imgDir); ?>/menu-contactus-hover.gif";
      image_url[5] = "<?php echo $this->escape($this->imgDir); ?>/menu-64.gif";
      image_url[6] = "<?php echo $this->escape($this->imgDir); ?>/menu-79.gif";
      image_url[7] = "<?php echo $this->escape($this->imgDir); ?>/menu-05.gif";
      image_url[8] = "<?php echo $this->escape($this->imgDir); ?>/menu-trucks.gif";
      image_url[9] = "<?php echo $this->escape($this->imgDir); ?>/menu-dyno.gif";
      image_url[10] = "<?php echo $this->escape($this->imgDir); ?>/background-menu2.gif";
      image_url[11] = "<?php echo $this->escape($this->imgDir); ?>/menu-new.gif";
      image_url[12] = "<?php echo $this->escape($this->imgDir); ?>/menu-new2.gif";
      image_url[13] = "<?php echo $this->escape($this->imgDir); ?>/menu-used.gif";
      image_url[14] = "<?php echo $this->escape($this->imgDir); ?>/menu-used2.gif";
      image_url[15] = "<?php echo $this->escape($this->imgDir); ?>/menu-manufacturers.gif";
      image_url[16] = "<?php echo $this->escape($this->imgDir); ?>/menu-cantfind.gif";
      image_url[17] = "<?php echo $this->escape($this->imgDir); ?>/menu-cougars.gif";
      image_url[18] = "<?php echo $this->escape($this->imgDir); ?>/menu-cougars-hover.gif";
      
       var i = 0;
       for(i=0; i<=19; i++) 
         preload_image_object.src = image_url[i];
    }