Display TextBox over image in ASP.Net

This way

<div>
    <asp:Image ID="Image1" runat="server" ImageUrl = "http://www.aspforums.net/Avatars/Mudassar.jpg?634592399822400000" />
    <br />
    <asp:TextBox ID="txt" runat="server" style = "position:relative;top:-22px;z-index:1;width:110px"></asp:TextBox>
    </div>