[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

if(document.getElementById("arect").value == null){
    alert('NULL >> '+ xx.value);
  }

This code always returns null or error. If you want to see if the object exists, do the following....

if(xx == null)
   alert('Object does not exist');
else 
   alert('Object exists. Inner HTML: ' + xx.innerHTML);

Also, div does not have value. If you want to get the html inside div, use xx.innerHTML