Prevent from adding the itjs_call envelope more than once

1 files changed, 3 insertions, 3 deletions

diff --git a/itjs.class b/itjs.class
index 22c5730..f6da4cb 100644
--- a/itjs.class
+++ b/itjs.class
@@ -30,12 +30,12 @@ function send_headers()
 /**
  * Serialize the result into a javascript script
  * @param $values Array with values to be serialized
- * @param $callback Javascript function to call with data (iframe solution)
+ * @param $envelope Encapsulate the data when callback function is provided (iframe solution)
  * @return String with javascript code to be sent to client
  */
-function serialize($values)
+function serialize($values, $envelope = false)
 {
-	if ($callback = it::replace(array('[^\w.]' => ""), $_REQUEST['itjs_call']))
+	if (($envelope || isset($values['eof'])) && ($callback = it::replace(array('[^\w.]' => ""), $_REQUEST['itjs_call'])))
 	{
 		$target = $_REQUEST['itjs_iframe'] ? "parent" : "window";
 		$header = "$target.it_loader && $target.$callback(";