var homeoff              = new Image();
   var homeon               = new Image();
       homeoff.src          = "images/bttn_home_off.gif"; 
       homeon.src           = "images/bttn_home_on.gif"; 


  var philoff              = new Image();
  var philon               = new Image();
       philoff.src          = "images/bttn_phil_off.gif"; 
       philon.src           = "images/bttn_phil_on.gif"; 


  var servicesoff              = new Image();
  var serviceson               = new Image();
       servicesoff.src          = "images/bttn_services_off.gif"; 
       serviceson.src           = "images/bttn_services_on.gif"; 


  var contactoff              = new Image();
  var contacton               = new Image();
       contactoff.src          = "images/bttn_contact_off.gif"; 
       contacton.src           = "images/bttn_contact_on.gif"; 


  var sitemapoff              = new Image();
  var sitemapon               = new Image();
       sitemapoff.src          = "images/bttn_sitemap_off.gif"; 
       sitemapon.src           = "images/bttn_sitemap_on.gif";