I created an viewport with center, north, south and west pane.
In the west pane, there is the tree navigation. In center pane there I have the content where I load the pages in tabs. On one page, I want to check for changes in an form. It should work everytime I navigate to another tab, page or anything else. In you demo, you use the "page unload" event. This doesn´t work for me. There are many other events, but which is the right one? I tried some, but I didn´t get an result.
Thanks in advance.