title: What does "this" refer to inside a function in an "on.." attribute?
body: <p>For example, what is the difference between <code>&lt;td  id='xyz' onmouseover='doIt(this)'...</code>
  and  <code>&lt;td  id='xyz' onmouseover='doIt()'...</code>.  Is <code>this</code> the DOM element?</p>