js无法识别重音字符onclick

I have an input element which has an onkeyUp bind. The problem I am facing is that when a user enters accented chars i.e: Ä ä Ö ö Ü ü The JS does not fire the onkeyup event/function. on regular chars this works fine. Also, if I enter an accented char and a regular char (Ös) the bind recognizes both charecters and fire the event/function. Also, copy pasting the accented char works great. Any ideas?I have an input element which has an onkeyUp bi