Thank you for your response McBlob.
I know what to expect from the shortcuts. I need to get acces to the menu and/or to shortcuts like "back to previos page". And there IS at previous page = the page where I opened the document.
I have tried this on several installations - and the problem lies in Reade XI. I have Win7 with sp1 and IE10 on my own machine.
I have a program running on around 1500 installations and the problem is on all machines with Reader XI.