Yuriy,
My point is
you should not build the browser and its component around your application. Te applicaiton should be built around the browser. A lot of companies now a days are getting sued for inaccessability of their sites. Things like this are a reason. (It is an intranet application, so large companies to hire disabled people!)
What harm does typing something in do? Oh, the server does not load anything so you need to return an error message. Not hard to do. I personally use my tab key, enter key, space bar, etc to navigate a web page when I am on my tablet. I really hate using the small touch panel and I really do not feel like taking out the pen to do thigs when I can do it all from the keyboard!
Just a personal rant I have. LOL
Eric