Updated CodeCorner2 (markdown)

CodeCorner2.md

@@ -151,3 +151,9 @@ Much better, but some nagging error in the upper left corner of the frame where
 	}
 ``` 
 so we recieve our inital page o.k.
+But on Submit. It just did not work. After some work we figured out that ```$_SERVER['PHP_SELF']``` is
+pointing to eGroupware Base ```index.php```. So we had to make our form-action more specific:
+```php
+	    echo "<form action='".$_SERVER['PHP_SELF']."?menuaction=test.test_ui.testinterface' method='post'>
+``` 
+this is in no way eGroupwarer - style. So this needs further refinement.