//javascript for navigation
<!--
hover = 
  (((navigator.appName == "Netscape") && 
  (parseInt(navigator.appVersion) >= 3 )) || 
  ((navigator.appName == "Microsoft Internet Explorer") && 
  (parseInt(navigator.appVersion) >= 4 ))); 
function preload(img) 
{
  var a=new Image(); a.src=img; return a; 
}



        if(hover) { nav1n=preload('_images/home-nav.gif'); nav1h=preload('_images/home-nav-hi.gif');  }

        if(hover) { nav2n=preload('_images/acc-nav.gif'); nav2h=preload('_images/acc-nav-hi.gif'); }

        if(hover) { nav3n=preload('_images/his-nav.gif'); nav3h=preload('_images/his-nav-hi.gif'); }

        if(hover) { nav4n=preload('_images/nat-nav.gif'); nav4h=preload('_images/nat-nav-hi.gif'); }

        if(hover) { nav5n=preload('_images/loc-nav.gif'); nav5h=preload('_images/loc-nav-hi.gif'); }

        if(hover) { nav6n=preload('_images/tar-nav.gif'); nav6h=preload('_images/tar-nav-hi.gif'); }

        if(hover) { nav7n=preload('_images/book-nav.gif'); nav7h=preload('_images/book-nav-hi.gif'); }

        if(hover) { nav8n=preload('_images/map-nav.gif'); nav8h=preload('_images/map-nav-hi.gif'); }

// -->