how can i read an element except specific child element?
<p>sorry for bad english.
i want to read element with "a" id but  no "b" element in result?</p>

<pre><code>&lt;div id="a"&gt;
hi
&lt;div id="b"&gt;
every one
&lt;/div&gt;
&lt;div&gt;bye&lt;/div&gt;
&lt;/div&gt;
</code></pre>

<p>and result should be</p>

<pre><code> hi &lt;div&gt;bye&lt;/div&gt;
</code></pre>

<p>how to do this?</p>
