title: How is jquery used to check for the 'disabled' attribute on an <a> tag?
body: <p>I have a <code>disabled='disabled'</code> attribute on an <code>&lt;a&gt;</code> tag.  How do I test to see if this attribute is on my tag using jquery?  The following code returns <code>undefined</code>.  I can see the <code>disabled</code> attribute on the tag in firebug and all other attributes on the anchor return successfully using the same syntax.  I realize <code>disabled</code> is a custom attribute for an <code>&lt;a&gt;</code> tag.</p>
  
  <pre><code>$('#anchorID').attr('disabled');
  </code></pre>