keypress is not working in gridview within update panel

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ASP.NET

jQuery

Hi everyone,

I am implementing a grid view containing few text boxes. And all those text boxes should not get any type of char value. I have implemented it(on keypress event of jquery by taking the class of the text boxes within grid view) and its working fine. Put that grid within an update panel. But when ever I am generating the gridview on a button click. it is not working. I didn't get any type of error message in browser's console. If I remove the update panel and generate the grid its working. Its not working whenever the gridiew is within Upadte panel and its generating from back end. Any one can help me to get rid of this silly error.

Jquery:

$(document).ready(function () {
            $('.scenario-input').keypress(function (e) {
                alert('aa');
                var a = [];
                var k = e.which;

                for (i = 48; i < 58; i++)
                    a.push(i);

                // allow a max of 1 decimal point to be entered
                if (this.value.indexOf(".") === -1) {
                    a.push(46);
                }

                if (!(a.indexOf(k) >= 0)) e.preventDefault();

                alert('KeyCode: ' + k);
            });
        });

and gridview

<asp:UpdatePanel ID="uy1" runat="server">
                <ContentTemplate>
                    <asp:Button ID="b" runat="server" OnClick="b_Click" />
                    <asp:GridView ID="GridView1" runat="server" Visible="false">
                        <Columns>
                            <asp:TemplateField>
                                <ItemTemplate>
                                    <asp:TextBox ID="id1" runat="server" class="scenario-input"></asp:TextBox>

                                </ItemTemplate>
                            </asp:TemplateField>
                        </Columns>
                    </asp:GridView>
                </ContentTemplate>
            </asp:UpdatePanel>