Goodmorning, why JavaScript doesn't run correctly?

Question

Sorry I am new to sololearn.. Check my code..

https://code.sololearn.com/WMo7NIs9807M/?ref=app

Answer 1

window.onload = function() {
your code
}

https://www.sololearn.com/post/90825/?ref=app

Answer 2

Thanks for the response, I put it, now work without error but didn't work correctly..