title: How to detect onmousedown on iframe with external content?
body: <p>I'm trying to know when an user clicks on an iframe with external content (a page not owned by me). The reason I need to do it is that my site relies heavily on keyboard navigation and when the iframe is focused I need to tell users to click outside to keep playing.</p>
  
  <p>I'm using a transparent div on on top of the iframe with an onmousedown event. But it's not a great choice since the user needs to click once for the div to disappear and once again to click wherever they want on the iframe.</p>
  
  <p>Are there are other ways to know when the user clicks on the iframe?</p>
  
  <p>Thanks</p>