[removed] document.getElementById() returns NULL

Question

I am quite new with Javascript and I got a problem with document.getElementById() that always returns NULL, and that\'s driving me nuts.

I have a element in my code

Answer 1

The page contents need to be loaded before trying to read them. Try

window.onload = function() {
  // run your script in here
}

Or if you're using jQuery, prefer

$(document).ready(function() {
  ...
}