var opts  = ['experience','announcements','feedback'];

function toggle_yy(which) {
  for (var i in opts) {
    $g('yy_div_'+opts[i]).className             = 'yourYorkExpBox '+((opts[i] == which) ? 'show' : 'hide');
    $g('yy_href_'+opts[i]).parentNode.className  = ((opts[i] == which) ? 'active ' : '')+$g('yy_href_'+opts[i]).parentNode.className.replace(/active/,'');
  }
}

yy_old_onload = window.onload;
window.onload = function() {
  yy_old_onload();
  if (document.getElementById('yy_href_experience'))    $g('yy_href_experience').onclick    = function() { toggle_yy('experience');     return false; };
  if (document.getElementById('yy_href_announcements')) $g('yy_href_announcements').onclick = function() { toggle_yy('announcements');  return false; };
  if (document.getElementById('yy_href_feedback'))      $g('yy_href_feedback').onclick      = function() { toggle_yy('feedback');       return false; };
}