Cool, but i should restrict my problem a little bit.
When the timer is over, the DocSave should be in background without an partial refresh.
The Button.onclick() event was also unsuccessful.
In my case i triggered the onclick event from CSJS function (I used dojo), but the SSJS Code from the Button onclick event was not applied ( simple console print).
The other solution dojo.xhrPost() sounds pretty good, but could I execute SSJS within it ?
Greetings from Berlin
Martin