if (document.images) 
{
      img1 = new Image();
      img2 = new Image();
      img3 = new Image();
      img4 = new Image();
      img5 = new Image();
      img6 = new Image();
      img7 = new Image();
      img1.src ="images/link_clients_over.gif"; 
      img2.src ="images/link_contact_over.gif"; 
      img3.src ="images/link_home_over.gif"; 
      img4.src ="images/link_listen_over.gif";
      img5.src ="images/link_photos_over.gif";
      img6.src ="images/link_testimonials_over.gif";
      img7.src ="images/link_venues_over.gif";
}