title: JSONP with Rails
body: <p>I'm trying to retrieve JSON data from a remote site with Rails/Prototype.</p>
  
  <p>I've found that there's <a href="http://github.com/dandean/Ajax.JSONRequest" rel="nofollow noreferrer">a branch of Prototype</a> that has an <code>Ajax.JSONRequest()</code> function. I can't get this to work.</p>
  
  <p>jQuery has a <code>$.getJSON()</code> function, but I'm using some Prototype functions and I'd rather not switch to jQuery or use no conflict mode.</p>
  
  <p>What am I missing? It seems like this would be easily done with Rails or Prototype.</p>