if empty between tag <ul> give alert.?
<p>I want if empty between tag <code>ul</code> alert <code>hello</code>. how is it?</p>

<pre><code>&lt;button class="click"&gt;Click&lt;/button&gt;&lt;p&gt;

&lt;span&gt;
    &lt;ul&gt;&lt;/ul&gt;
&lt;/span&gt;
</code></pre>

<p>js:</p>

<pre><code>$('.click').click(function() {
    if('span ul' == ''){alert('hello')};
});
</code></pre>

<p><strong>EXAMPLE:</strong> <a href="http://jsfiddle.net/KDAwP/1/" rel="nofollow">http://jsfiddle.net/KDAwP/1/</a></p>
