<!--
navCount = 6;
navName = new Array(navCount);
navEnabled = new Array(navCount);
navDisabled = new Array(navCount);
function preloadNav(position, filename)
{
  navName[position] = filename;
  navEnabled[position] = new Image();
  navEnabled[position].src = filename + "2.gif";
  navDisabled[position] = new Image();
  navDisabled[position].src = filename + "1.gif";
}
preloadNav(0, "nav-home");
preloadNav(1, "nav-research");
preloadNav(2, "nav-people");
preloadNav(3, "nav-photos");
preloadNav(4, "nav-links");
preloadNav(5, "nav-login");
function rollOn(number)
{
  if (document.images)
  {
    if (document[navName[number]] != null)
    {
      document.images[navName[number]].src = navEnabled[number].src;
    }
  }
}
function rollOff(number)
{
  if (document.images)
  {
    if (document[navName[number]] != null)
    {
      document.images[navName[number]].src = navDisabled[number].src;
    }
  }
}
-->