title: Query string to pre-select radio button
body: <p>Generally when i have used query strings in the past i have easily parsed variables so that the input value is shown in the form when the page loads.</p>
  
  <p>E.G. <code>www.form.com?email=test@test.com</code> - which would pre-populated the email input. But i am not sure how to use for radio buttons.</p>
  
  <p>E.G. say if i have a yes <code>(id = rsvp_0)</code> and a no <code>(id= rsvp_1)</code> radio button. I have tried to parse <code>www.form.com?email=test@test.com&amp;rsvp_0=checked</code> with no luck. I have also tried yes, 1 and all other variations.</p>
  
  <p>Assistance appreciated</p>
  
  <p>PS - here is a working example to test with: <a href="http://storage.coremotivesmarketing.com/library/dff93ae6-e2b5-4b50-abd9-3b539016a95b/707/webforms/d9d2c17b-c42b-e311-8aea-000c299b63b3.htm?txtEmailAddress=c@c.com.au&amp;rsvp_0=checked" rel="nofollow">http://storage.coremotivesmarketing.com/library/dff93ae6-e2b5-4b50-abd9-3b539016a95b/707/webforms/d9d2c17b-c42b-e311-8aea-000c299b63b3.htm?txtEmailAddress=c@c.com.au&amp;rsvp_0=checked</a></p>
  
  <p>Regards,
  Chris</p>