// top nav js

if (document.images) {
  img1on = new Image();
  img1on.src = "/images/top_nav/about_o.gif";
  img1off = new Image();
  img1off.src = "/images/top_nav/about.gif";
  
  img2on = new Image();
  img2on.src = "/images/top_nav/capabilities_o.gif";
  img2off = new Image();
  img2off.src = "/images/top_nav/capabilities.gif";

  img3on = new Image();
  img3on.src = "/images/top_nav/knowledge_o.gif";
  img3off = new Image();
  img3off.src = "/images/top_nav/knowledge.gif";

  img4on = new Image();
  img4on.src = "/images/top_nav/career_o.gif";
  img4off = new Image();
  img4off.src = "/images/top_nav/career.gif";

  img5on = new Image();
  img5on.src = "/images/top_nav/contact_o.gif";
  img5off = new Image();
  img5off.src = "/images/top_nav/contact.gif";
}