title: Unable to click on a button inside an iframe
body: <p>Scenario:<br>
  Launch <a href="http://www.indiabookstore.net/" rel="nofollow noreferrer">http://www.indiabookstore.net/</a>.<br>
  Click on <strong>FB like button</strong> which is inside an iframe. (scroll down to see it)</p>
  
  <p>Issue:<br>
  I'm able to switch to the iframe, but couldn't click on the button, as there is a <strong>NoSuchElementException</strong></p>
  
  <p>I tried giving relative as well as absolute xpaths, didn't work.</p>