title: HTML make <option> invalid
body: <p>I have the following piece of code in a contact form for a site I am designing:</p>
  
  <pre><code>&lt;select id="Category" name="Category"&gt;
      &lt;option value="0" selected="selected" disabled&gt;Category&lt;/option&gt;
      &lt;option value="1"&gt;General Info&lt;/option&gt;
      &lt;option value="2"&gt;Booking&lt;/option&gt;
      &lt;option value="3"&gt;Auditions&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>I would like set the menu such that the user cannot leave <code>category</code> as the selected option. Is there any way to do this with HTML? If not, how would I do it with JavaScript?</p>
  
  <p>Thank you</p>