How to get a part of id element using jQuery?
<p>How I can get a "Some text" from span with id="old-[id]" and put it in id="new-[id]" ?</p>

<pre><code>&lt;span id="old-1"&gt;Some text&lt;/span&gt;
&lt;span id="new-1"&gt;&lt;/span&gt;
&lt;span id="old-5"&gt;Some text&lt;/span&gt;
&lt;span id="new-5"&gt;&lt;/span&gt;
</code></pre>

<p>I don't know how to get a digital part of <code>id</code> without <code>substring()</code> function. 
I think exists is more correct solution.
Thanks.</p>
