title: how to disable default context menu for certain elements in mozilla using Prototype?
body: <p>I'm trying to expand navigation options of the context menu on certain elements (specifically, <code>h1</code> and <code>h2</code> tags)
  I want to prevent the browser's default action when right-clicking on those elements.</p>
  
  <p>I found nice information at <a href="http://ajaxcookbook.org/disable-browser-context-menu/" rel="nofollow noreferrer">this page</a>.</p>
  
  <p>However, I couldn't find how to disable the context menu for certain elements. Does someone know how to do it?</p>
  
  <p>I'm using prototype as my javascript API.</p>