Finding class where button is clicked

Question

I know i have asked this question many times but i still havnt found the rigth answer.

num needs to be displayed in ONLY the class that the button was clicked in.

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Answer 1

onClick='javascript:ajax_posta();'

should be

onClick='ajax_posta()'

Are you sure the result is positive? The quality of your asked question is very poor and I can't really understand what you are asking..

What do you mean by "num needs to be displayed in ONLY the class that the button was clicked in."