onclick & function

Question

Why "y.onclick=function cfr()" not working? Am I not correctly calling the function?
https://code.sololearn.com/WaW0uMFEgKb1/?ref=app

Answer 1

Use
y.addEventListener("click",cfr);
or
y.onclick=cfr;
instead of
y.onclick=cfr();

Answer 2

thank you, Mohammed!

Answer 3

You're welcome, Илья