Validate textarea before form submission
<p>How can you validate a <code>&lt;textarea&gt;</code> after data has been entered (blur?) and before a form has been submitted?</p>

<p>For instance, I have a <code>&lt;textarea&gt;</code> and the user enters in this data:</p>

<pre><code>alpha beta charlie delta
</code></pre>

<p>After the user is done entering in this data and the textarea is no longer focused, I'd like for it to validate and alert the user if they entered the word <code>beta</code></p>
