function reportSlideChanges()
{
$this->_template->disableHeader();
$this->_template->disableFooter();
$id = @$_GET['slide'];
$compareTo = @$_GET['compareTo'];
if (!isset($id)) {
die("Error in receiving Slide id!");
}
$slide1 = new Slide();
$slide2 = new Slide();
$slide1->createFromIDLite($id);
if (!isset($compareTo)) {
$slide2->id = $slide1->getPreviousRevisionID();
} else {
$slide2->id = $compareTo;
}
$slide2->createFromIDLite($slide2->id);
//$slide2->content=$this->tidyhtml($slide2->content);
//$slide1->content=$this->tidyhtml($slide1->content);
$this->set('new_content', htmlspecialchars($slide1->content));
$this->set('old_content', htmlspecialchars($slide2->content));
$this->set('slide_id', $id);
//echo $this->htmlDiff($slide2->content, $slide1->content);
}