// Initialize the buttons for exchange
function init_nav() {
   if (document.images) {
      missionOFF = new Image(172,27);
      missionOFF.src = "images/Mission.gif";
      missionON = new Image(172,27);
      missionON.src = "images/hiMission.gif";
      programOFF = new Image(172,27);
      programOFF.src = "images/Program.gif";
      programON = new Image(172,27);
      programON.src = "images/hiProgram.gif";
      volunteersOFF = new Image(172,27);
      volunteersOFF.src = "images/Volunteers.gif";
      volunteersON = new Image(172,27);
      volunteersON.src = "images/hiVolunteers.gif";
      sponsorsOFF = new Image(172,27);
      sponsorsOFF.src = "images/Sponsors.gif";
      sponsorsON = new Image(172,27);
      sponsorsON.src = "images/hiSponsors.gif";
      historyOFF = new Image(172,27);
      historyOFF.src = "images/History.gif";
      historyON = new Image(172,27);
      historyON.src = "images/hiHistory.gif";
      menusOFF = new Image(172,27);
      menusOFF.src = "images/Menus.gif";
      menusON = new Image(172,27);
      menusON.src = "images/hiMenus.gif";
      linksOFF = new Image(172,27);
      linksOFF.src = "images/Resources.gif";
      linksON = new Image(172,27);
      linksON.src = "images/hiResources.gif";
      contactusOFF = new Image(172,27);
      contactusOFF.src = "images/ContactUs.gif";
      contactusON = new Image(172,27);
      contactusON.src = "images/hiContactUs.gif";
   }
}

function offButton(button) {
   if (document.images) { document.images[button].src = eval(button+"OFF.src") }
}

function onButton(button) {
   if (document.images) { document.images[button].src = eval(button+"ON.src") }
}