JavaScipt - capture of ctrl + smth

[Former Community Member]

I need to capture letters from input of the textfield. I'm doing this with xfa.event.change event. But I don't know how to capture f.ex ctrl+v. So I want to knwo when users enters ctrl+v and put something else in the text field. Is there a way to do this? I am able to capture enter by doing it like this:

if(xfa.event.change=="\n"){

xfa.event.change=" ";

}

But it doesn't work with ctrl