title: JQuery.ajax success function returns empty
body: <p>I have a very basic AJAX function in JQuery:</p>
  
  <pre><code>$.ajax({
      url: "http://www.google.com",
      dataType: "html",
      success: function(data) {
          alert(data);
      }
  });
  </code></pre>
  
  <p>But the <code>data</code> is always an empty string, no matter what url I go to...  Why is that?  I am running this locally at <code>http://localhost:3000</code>, and am using JQuery 1.4.2.</p>
  
  <p>If I make a local response, however, like this:</p>
  
  <pre><code>$.ajax({
      url: "http://localhost:3000/test",
      dataType: "html",
      success: function(data) {
          alert(data);
      }
  });
  </code></pre>
  
  <p>...it returns the html page at that address.  What am I missing here?</p>