regular expression sequence numbers 1 to 15
<p>I need a way to use a regular expression to validate that numbers in a string are consecutive, from 0 to 9.  For example:</p>

<ul>
<li>12345</li>
<li>1234567890</li>
<li>2345678</li>
<li>456789</li>
</ul>

<p>The maximum length of the string should be 5 characters.</p>
