-if ( isset( $_GET['chapter'] ) )
-{
- $chapter = intval( $_GET['chapter']);
-}
-elseif (isset($_SERVER['HTTP_REFERER']))
-{
- $ref = strtolower($_SERVER['HTTP_REFERER']);
+if ( sqgetGlobalVar('chapter', $temp, SQ_GET) ) {
+ $chapter = (int) $temp;
+} elseif ( sqgetGlobalVar('HTTP_REFERER', $temp, SQ_SERVER) ) {
+ $ref = strtolower($temp);