public function set_url_replacements($element_attribute = null)
{
if ($element_attribute === null) {
$element_attribute = array('a' => 'href', 'area' => 'href', 'blockquote' => 'cite', 'del' => 'cite', 'form' => 'action', 'img' => array('longdesc', 'src'), 'input' => 'src', 'ins' => 'cite', 'q' => 'cite');
}
$this->replace_url_attributes = (array) $element_attribute;
}