title: Is if(document.getElementById('something')!=null) identical to if(document.getElementById('something'))?
body: <p>When I want to check if an element exists in a page. Are these two checks the same? 
  Is there a better more compact way to check the existence?</p>
  
  <p>What if I want to check if the <code>value == ''</code>. Can this be included in this check as well?</p>