function activelayer (subnav) {
  if (document.getElementById('sets_l'))
    document.getElementById('sets_l').style.visibility='hidden';
  if(subnav && subnav != 'out') {
    if(subnav == 'sets' && document.getElementById(subnav+'_l')) {
      document.getElementById(subnav+'_l').style.visibility='visible';
    }
  }
}

function picrollover (picid) {
  document.getElementById(picid).src='images/nav/'+picid+'1.gif';
}

function picrollout (picid) {
  document.getElementById(picid).src='images/nav/'+picid+'.gif';
}