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 function prepareimages() {

  $this->imgsearch="/\[img]([^\"\?\&]*\.(gif|jpg|jpeg|bmp|png|php*|php))\[\/img\]/siU";
  if($this->showimages==1) $this->imgreplace="<img src=\"\\1\" border=0>";
  else $this->imgreplace="<a href=\"\\1\" target=\"_blank\">\\1</a>";
 }