Retrieve substring from given string
<p>This question is related to login. This answer may be simple but still 30 mins I am trying using jquery OR javascript.</p>

<p>Given string Example :</p>

<p><code>john123,ricky43567,jecobs2</code> and many more like this</p>

<p>Retrieve only character from it.</p>

<p>above string result will be like..</p>

<pre><code>john,ricky,jecobs
</code></pre>

<p>Thanks in advance. </p>
