title: Javascript top variable in IE8
body: <p>I am trying to reference a javascript function in a .js file loaded in my main page from an iframe using the 'top' variable.  It works in FF, Safari, and IE6 but not in IE8.</p>
  
  <p>The snippet is (assigned to onmouseover):</p>
  
  <p><code>
      top.set_image(this, 'images/login_h.png')
  </code></p>
  
  <p>Where set_image is my function.</p>
  
  <p>The error is "Object does not support this function"</p>
  
  <p>Also, I have been looking for the definition of top.  I can't find it in the ECMAScript specification or the w3schools site and Google is unhelpful (who'da thunk top was a common word?).</p>