<!-- Hide from older browsers

if (document.images) {
  var first_off = new Image();
  first_off.src = "button1-mission.png";
  var first_on = new Image();
  first_on.src = "button1-mission-on.png";

  var second_off = new Image();
  second_off.src ="button1-artwork.png";
  var second_on = new Image();
  second_on.src = "button1-artwork-on.png";

  var third_off = new Image();
  third_off.src ="button1-galleries.png";
  var third_on = new Image();
  third_on.src = "button1-galleries-on.png";

  var fourth_off = new Image();
  fourth_off.src ="button1-events.png";
  var fourth_on = new Image();
  fourth_on.src = "button1-events-on.png";

  var fifth_off = new Image();
  fifth_off.src ="button1-map.png";
  var fifth_on = new Image();
  fifth_on.src = "button1-map-on.png";

   var sixth_off = new Image();
  sixth_off.src ="button1-bid.png";
  var sixth_on = new Image();
  sixth_on.src = "button1-bid-on.png";

   var seventh_off = new Image();
  seventh_off.src ="button1-sponsors.png";
  var seventh_on = new Image();
  seventh_on.src = "button1-sponsors-on.png";

   var eighth_off = new Image();
  eighth_off.src ="button1-home.png";
  var eighth_on = new Image();
  eighth_on.src = "button1-home-on.png";

}

function activate(imgName) {
  if (document.images) {
    if ( eval(imgName + "_on.complete") ) {
      document.images[imgName].src = eval(imgName + "_on.src");
    }
  }
}

function deactivate(imgName) {
  if (document.images) {
    if ( eval(imgName + "_off.complete") ) {
      document.images[imgName].src = eval(imgName + "_off.src");
    }
  }
}

// End script hiding -->