title: Is 'disabled' a valid attribute for an anchor tag
body: <p>If I have the following simple code segment: </p>
  
  <pre><code>&lt;div ng-app="myApp"&gt;
      &lt;a ng-disabled='true' ng-click="value1=123"&gt;click me&lt;/a&gt;
      &lt;button ng-disabled='true' ng-click="value2=123"&gt;click me&lt;/button&gt;
      =={{value1}}==
      =={{value2}}==
  &lt;/div&gt;
  </code></pre>
  
  <p>As you can see from the fiddle : <a href="http://jsfiddle.net/basarat/czVPG/">http://jsfiddle.net/basarat/czVPG/</a> the button is not clickable and ng-click (which is simply a jquery <code>on('click',function(){})</code> ) does not execute. However it does execute for the anchor tag. </p>
  
  <ul>
  <li>Is it because disabled is not a valid attribute for an anchor tag?</li>
  <li>If it is why does it still trigger the dom click event when a button does not? </li>
  </ul>