isFunction() always false in jQuery
<p>so I'm using qtip for a super simple tool tip implementation.</p>

<p>I'm not including qtip on every page, only the pages that needed, so I'm trying to check for qtip's existence before calling it.</p>

<pre><code> /*
  * Tool Tip
  * inits qtip on any link with class="tt"
  */
  if( $.isFunction( $.qtip ) ){
  $(".tt").qtip();
  }
</code></pre>

<p>I've no idea what this isn't working. it's always returning false. Any ideas? Thx.</p>
