var nav_links = new Array( "home", "vets", "staff", "services", "pet_care", "news", "location", "boarding", "grooming", "contact" );
var rollover_states = new Array( "on", "off" );
// Preload navbar link images >> 
for ( nav_link in nav_links ) {
  for ( rollover_state in rollover_states ) {
    window[ ( "nav_link_" + nav_links[ nav_link ] + "_" + rollover_states[ rollover_state ] ) ] = new Image();
    
    window[ ( "nav_link_" + nav_links[ nav_link ] + "_" + rollover_states[ rollover_state ] ) ].src = "./images/layout/nav_bar/" + nav_links[ nav_link ] + "_" + rollover_states[ rollover_state ] + ".gif";
  }
  // ^^ end for
}
// ^^ end for
function nav_roll( nav_link_name, new_rollover_state ) {
  // Rollover the navbar link image >>
  if ( document.images[ "nav_link_" + nav_link_name ] != void(0) ) {
 
    document.images[ "nav_link_" + nav_link_name ].src = window[ "nav_link_" + nav_link_name + "_" + new_rollover_state ].src;
  
  }
  return;
}
// ^^ end nav_roll