title: reCaptcha doesn't load intermittently
body: <p>I'm currently building a website that uses reCaptcha to provide some security for the customer entry form.</p>
  
  <p>Because I have to cater for new customer and existing customers on one page, using jQuery to switch between two different forms, I am using the Ajax API to create a new reCaptcha image each time the form is switched.</p>
  
  <p>Usually, the works fine.  However, recently I've started running into problems where the reCaptcha image on one of the forms doesn't load at all, while the image on the other form is fine.</p>
  
  <p>Using the various developer tools in the different browsers, I've found the following errors with the reCaptcha Ajax API at <a href="http://www.google.com/recaptcha/api/js/recaptcha_ajax.js" rel="nofollow">http://www.google.com/recaptcha/api/js/recaptcha_ajax.js</a>.</p>
  
  <pre><code>TypeError: Result of expression 'a("recaptcha_image")' [null] is not an object (Safari and Firefox).
  Uncaught TypeError: Cannot read property 'style' of null (Chrome)
  </code></pre>
  
  <p>If this is an error with the reCaptcha_ajax.js file, obviously there's not much I can do, but is there any way I may be able to cater for this.</p>