Disabled radio button losing value after postback
<p>I have two radio buttons that are disabled with javascript when the page loads. <code>RadioButton1</code> is checked by default. When I click the button to do a postback, the <code>RadioButton1</code> is no longer checked.</p>

<p>Anyone know why ?</p>

<p>Here's my code sample. The code behind is empty. </p>

<pre><code>&lt;asp:RadioButton ID="RadioButton1" runat="server"  GroupName="group" Checked="true"/&gt;
&lt;asp:RadioButton ID="RadioButton2" runat="server" GroupName="group" /&gt;
&lt;asp:Button ID="Button1" runat="server" Text="Button"&gt;&lt;/asp:Button&gt;
&lt;script type="text/javascript"&gt;
    window.onload = function () {
        var RadioButton1 = document.getElementById('&lt;%= RadioButton1.ClientID %&gt;');
        var RadioButton2 = document.getElementById('&lt;%= RadioButton2.ClientID %&gt;');

        RadioButton1.disabled = true;
        RadioButton2.disabled = true;
    };
&lt;/script&gt;
</code></pre>
