<asp:RadioButtonList ID="RdoBtnHasNotified" runat="server" RepeatDirection="Horizontal" AutoPostBack="True" OnSelectedIndexChanged="RdoBtnHasNotified_SelectedIndexChanged">
    <asp:ListItem Value="1">Yes</asp:ListItem>
    <asp:ListItem Value="0" Selected="True">No</asp:ListItem>
</asp:RadioButtonList>


<asp:TextBox ID="TxtHowNotified" runat="server" TextMode="MultiLine" MaxLength="100"></asp:TextBox>

i want to enable textbox by clicking on radiobuttonlist but i am not able to do so without making autopostback=true.how can i do it using javascript??