Validation for fax number only?
<p>I'm using the following validation for fax numbers:</p>

<pre><code>[RegularExpression(@"^\+[0-9]{1,3}\([0-9]{3}\)[0-9]{7}$", ErrorMessage = "This is not a valid fax number.")]
</code></pre>

<p>But the fax number form entry does not accept any input.</p>
