function makenav($id,$idtype="forum",$highlightlast=1) {
global $DB_site,$nav_url,$nav_title,$session,$threadcache;
$code = "";
if ($id!=-1) {
if ($idtype=="thread") {
if ( !isset($threadcache["$id"]) ) {
$getforumid=$DB_site->query_first("SELECT forumid FROM thread WHERE threadid=$id");
} else {
$getforumid['forumid'] = $threadcache["$id"]['forumid'];
}
$code=makenav($getforumid['forumid'],"forum",1);
if ($highlightlast) {
$templatename="nav_linkon";
} else {
$templatename="nav_linkoff";
}
if (strlen($code)>0) {
$code.=gettemplate("nav_joiner",0);
}