title: getelementbyID on load returns null
body: <p>I have this simple function that needs to find an element and set its height on load:</p>
  
  <pre><code>function setGround() { 
  
  document.getElementById('content').style.height = '40px';
  
          } 
  
  
  document.onload = setGround(); 
  </code></pre>
  
  <p>However the function returns "null" on load. Am I missing something obvious? Yes the element with that ID does exist.</p>
  
  <p>Thank you for your help.</p>