find control and html tags
<p>i have this code in my default aspx file : </p>

<pre><code>&lt;body&gt;
    &lt;form id="form1" runat="server"&gt;
    &lt;div&gt;
        &lt;asp:PlaceHolder ID="holder1" runat="server"&gt;
            &lt;asp:Label ID="label1" runat="server" Text="Label"&gt;
            &lt;/asp:Label&gt;
            &lt;input type="text" ID="txt" runat="server"/&gt;
            &lt;asp:TextBox ID="txt2" runat="server"&gt;&lt;/asp:TextBox&gt;
             &lt;asp:Button Text="Ok" ID="btnOk" runat="server" onclick="btnOk_Click" /&gt;
        &lt;/asp:PlaceHolder&gt;


    &lt;/div&gt;
    &lt;/form&gt;
&lt;/body&gt;
</code></pre>

<p>and my code behind is :</p>

<pre><code>        TextBox tb1 = holder1.FindControl("txt") as TextBox;
        Response.Write(tb1.Text);
        TextBox tb2 = holder1.FindControl("txt2") as TextBox;
        Response.Write(tb2.Text);
</code></pre>

<p>my problem is here that findcontrol ("txt") return null value!!! because i used <code>&lt;input&gt;</code> ,how can i handle this control ?</p>
