span is getting added with AspNetDisabled class in sample application. but not in our project if we disable the control
<p>In my Project,</p>

<pre><code>&lt;span disabled="disabled"&gt;
&lt;input id="_ctl0_ContentHolderArea_CheckBox1" type="checkbox" name="_ctl0:ContentHolderArea:CheckBox1" disabled="disabled" /&gt;
&lt;/span&gt;
</code></pre>

<p>In Sample,</p>

<pre><code>&lt;span class="aspNetDisabled"&gt;
&lt;input id="CheckBox1" type="checkbox" name="CheckBox1" disabled="disabled" /&gt;
&lt;/span&gt;
</code></pre>
