What's wrong with my program?

Question

Why div isn't at the center of page, and why there is no text inside div?
https://code.sololearn.com/WnOnv9Nj5NvM/?ref=app

Answer 1

Adilx01 it should be novi.innerHTML not novi.style.innerhtml

Answer 2

To center div you need to subtract 150 and 50 instead of adding it.