f($type=='hot'||$type=='com'||$type=='new'||$type=='lastview'||$type=='like')
  {
   if($f_id)
   {
    if(is_numeric($f_id)){
     $SQL=" fid=$f_id ";
    }else{
     $detail=explode(",",$f_id);
     $SQL=" fid IN ( ".implode(",",$detail)." ) ";
    }
   }
   else
   {
    $SQL=" 1 ";
   }

   if($type=='com')
   {
    $SQL.=" AND levels=1 ";
    $ORDER=' list ';
    $_INDEX=" USE INDEX ( list ) ";
   }
   elseif($type=='hot')
   {
    $ORDER=' hits ';
    $_INDEX=" USE INDEX ( hits ) ";
   }
   elseif($type=='new')
   {
    $ORDER=' list ';
    $_INDEX=" USE INDEX ( list ) ";
   }
   elseif($type=='lastview')
   {
    $ORDER=' lastview ';
    $_INDEX=" USE INDEX ( lastview ) ";
   }
   elseif($type=='like')
   {

    $SQL.=" AND id!='$id' ";

    if(!$keyword)
    {
     extract($db->get_one("SELECT keywords AS keyword FROM {$_pre}content WHERE id='$id'"));
    }

    if($keyword){
     $SQL.=" AND ( ";
     $keyword=urldecode($keyword);
     $detail=explode(" ",$keyword);
     unset($detail2);
     foreach( $detail AS $key=>$value){
      $detail2[]=" BINARY title LIKE '%$value%' ";
     }
     $str=implode(" OR ",$detail2);
     $SQL.=" $str ) ";

    }else{
     $SQL.=" AND 0 ";