title: How to remove clear button from IE7-9?
body: <p>I'm working with ExtJS 4.1.1 and I'm trying to remove IE's clear button from a number field. I'm able to achieve this in IE10 doing this :</p>
  
  <pre><code>input[type=text]::-ms-clear{display:none;}
  </code></pre>
  
  <p>Now I'd like to do the same in other versions of IE... Any idea? Do think that IE10 version switcher may have something to do with this?</p>