title: How to access iframe checkbox elements
body: <p>I have a web page that consists of a checkbox (parent) and on this same web page, I also have a iframe that is sourced from another page that displays a number of records, which also has a checkbox (children) against each record. If I tick the parent checkbox, I would like to cascade this through to all children checkboxs within the iframe as well as disable these children checkboxes.</p>
  
  <p>How can I access the checkboxes within the iframe?</p>
  
  <p>My iframe definition on the man page is similar to the following:</p>
  
  <pre><code>&lt;iframe id="iframe1" src="'+URL+'" style="border:none;width:799px;height:200px;" frameborder="1" framespacing="0" marginheight="0" marginwidth="0"&gt;&lt;/iframe&gt;
  </code></pre>