function nucleus_logout(session_id){ 
  //alert(session_id);
  //var sesc = document.getElementById('sesc').value;
  var url = urls.index+"logout.php?action=logout";
  //alert(url);
  var modreq=getHTTPObject(); 
  modreq.open("GET", url, true);    
  modreq.onreadystatechange=function(){
    if (modreq.readyState==4) {
      if (modreq.status==200) {
        //alert(modreq.responseText);
        //location.href=urls.index+"begin.php?action=logout";
        location.href=urls.index+"smf/?board=4&action=logout;sesc="+session_id;
        return true;
      } else {
        alert('There was a problem with makePOSTRequest.');
      }
    }
  }
  modreq.send(null);
}