title: jQuery: How can I use "$" instead of "jQuery"?
body: <p>I have simple jQuery in my site, yet I keep getting this error:</p>
  
  <pre><code>Uncaught TypeError: Property '$' of object [object DOMWindow] is not a function
  </code></pre>
  
  <p>The error only appears if I use "$" instead of "jQuery". </p>
  
  <pre><code>// This works
  jQuery(document).ready(function() {
      jQuery('#pass').keyup( ... );
  });
  
  // This doesn't
  $(document).ready(function() {
      $('#pass').keyup( ... );
  });
  </code></pre>
  
  <p>Do I need to do anything to use "$"?</p>