Quickly lookup window creation

.lookupwindow{ position:absolute; padding:15px; background:#fff; -webkit-border-radius: 4px 4px 4px 4px;

border-radius: 4px 4px 4px 4px; border:1px #C1C1C1 solid; left:33%;}

<div id="Valueslookupwindow" class="lookupwindow" runat="server" visible="true">

                        <form name="lookup">

                      

                            <table style="width:100%;">

                                <tr>

                                    <td>

                                        actual expense</td>

                                    <td>

                                        :</td>

                                    <td>

                                        <asp:TextBox ID="TextBox1" required runat="server"></asp:TextBox>

                                    </td>

                                </tr>

                                <tr>

                                    <td>

                                        actual Value</td>

                                    <td>

                                        :</td>

                                    <td>

                                        <asp:TextBox ID="TextBox2" required runat="server"></asp:TextBox>

                                    </td>

                                </tr>

                                <tr>

                                    <td>

                                        &nbsp;</td>

                                    <td>

                                        &nbsp;</td>

                                    <td>

                                        <asp:Button ID="Button1" runat="server" Text="save and close"

                                            onclick="Button1_Click" />

                                    </td>

                                </tr>

                            </table>

                             </form>

                        </div>