title: capturing click events on web-browser scrollbars
body: <p>is it possible to capture a click event on a scrollbar? I have some code where i am observing the click and mousedown events on the document. However, it seems that when I click on the scrollbar, the event is not captured. This leads me to believe that the scrollbars aren't really part of the document. (Assumption :-)) Is this a correct assumption?  What is the right way to do this so that the behaviour is consistent across all major browsers?</p>
  
  <p>sample code</p>
  
  <pre><code>document.observe('click', function(evt){
      //do something
      //blah blah blah
  });
  </code></pre>
  
  <p>Thanks</p>