get value of inside a tag with jQuery.?
<p>How can by jQuery get value inside tag <code>b</code>?</p>

<pre><code>&lt;span&gt;
 &lt;b&gt;hi_1&lt;/b&gt;
 &lt;b&gt;hi_2&lt;/b&gt;
 &lt;b&gt;hi_3&lt;/b&gt;
 &lt;b&gt;hi_4&lt;/b&gt;
&lt;span&gt;
</code></pre>

<p>I want this output with jQuery: <code>hi_1, hi_2, hi_3, hi_4</code><p>
Please give me example in <a href="http://jsfiddle.net/" rel="nofollow">jsfiddle</a>.</p>
