title: Skipping optional function parameters in JavaScript
body: <p>Could you please point me to the nice way of skipping optional parameters in JavaScript.</p>
  
  <p>For example, I want to throw away all <code>opt_</code> parameters here:</p>
  
  <pre><code>goog.net.XhrIo.send(url, opt_callback, opt_method, opt_content, {'Cache-Control': 'no-cache'}, opt_timeoutInterval)
  </code></pre>