title: How decode HEX in XMLHtppRequest?
body: <p>I have a site and I used AJAX.  And I got some problems.</p>
  
  <p>Server return JSON string something like this <code>{a:"x48\x65\x6C\x6C\x6F"}</code>.</p>
  
  <p>Then in <code>xx.responseText</code>, we have this string <code>'{a:"\x48\x65\x6C\x6C\x6F"}'</code>.</p>
  
  <p>But if I create JavaScript string <code>"\x48\x65\x6C\x6C\x6F"</code> then I have <code>"Hello"</code> and not HEX!</p>
  
  <p>Is it possible get in <code>xx.responseText</code> "real" text from HEX (automatically, without <code>.replace()</code>)?</p>