match divs by id and delete content inside that
<p>I have couple of divs like</p>

<pre><code>&lt;div id="rg_dia_0"&gt;
          zdszczxvzxvzxvc
&lt;/div&gt;
&lt;div id="rg_dia_1"&gt;
          dfgdZXcZC
&lt;/div&gt;
&lt;div id="rg_dia_2"&gt;
          hfhgjhgjdj
&lt;/div&gt;
</code></pre>

<p>I need javascript to fetch all the divs and delete the content. I think we can use regex to match the ids as only the number that is changing.</p>
