I want to make ebook that can call other application. For example, if reader of ebook clicks button or link, application like game will be executed. I thought it can be done by using Javascript but i couldn't find any information about it. If it is possible, please give me some hints.
p.s. My target platform is android tablet
No, you can't do that. Imagine the horrifying possibilities for malware-infested e-books.
Your ability to talk to the outside world from inside e-books is limited to invoking links that will open up in a browser when an anchor tag is tapped.
If you want the kind of functionality you mention, you would need to write your own custom e-book reader which supports that.