-if ((!empty($_POST['url'])) || (!empty($_GET['url'])) || (!empty($_GET['frame'])))
-{
- $url = URL;
- if (!empty($_POST['url'])) $url = $_POST['url'];
- if (!empty($_GET['url'])) $url = base64_decode(urldecode(COMPILE_CODE($_GET['url'])));
- switch ($_GET['frame'])
+if ((REQUEST_ISSET_POST(('url'))) || (REQUEST_ISSET_GET(('url'))) || (REQUEST_ISSET_GET(('frame')))) {
+ // Default URL is ours
+ $url = constant('URL');
+
+ // Decode URL if set in GET parameters
+ if (REQUEST_ISSET_GET(('url'))) $url = decodeString(str_replace(" ", "+", compileUriCode(urldecode(REQUEST_GET('url')))));
+
+ // Use URL from POST data if set
+ if (REQUEST_ISSET_POST(('url'))) $url = REQUEST_POST('url');
+
+ // Add missing element
+ $frame = "";
+ if (REQUEST_ISSET_GET(('frame'))) $frame = REQUEST_GET(('frame'));
+ switch ($frame)