Fix that error

Question

I want to change the html containt by js code
https://code.sololearn.com/W295pLx6Yszm/?ref=app

Answer 1

Do :
window.onload = function()
{
//your code here
}
That will wait the entire page is loaded before executing your JS code.

Answer 2

//As Théophile said change your js code to this

var adnan = document.getElementById("ad").innerHTML = "<P>ADNAN IS GREAT</P>";

Answer 3

Thanks its work for me