why am I getting javascript:unrecognized expression from this jquery?
<p>This is my jQuery code:</p>

<pre><code>$('.ajax_modal a').not('.popup').live('click', function(e){

//do something

 });
</code></pre>

<p>When I click on the anchor a.popup, I would expect nothing to happen:</p>

<pre><code>&lt;div class="ajax_modal"&gt;
&lt;a class="popup"&gt;Should do nothing&lt;/div&gt;
&lt;a class="something"&gt;Should do something&lt;a&gt;
&lt;/div&gt;
</code></pre>

<p>Instead I get the following error which is breaking my page:</p>

<p><strong>Error: Syntax error, unrecognized expression: .ajax_modal a.not(.popup)</strong></p>
