Javascript 用于多个文本框和图像控件的单个ajax日历扩展程序？

我正在寻找一个ajax日历扩展器，用于多个文本框和日历图像控件

我们怎么能做到呢？我在下面找到了关于文本框而不是日历图像控件的好文章

请帮助我得到这个与图像控制也

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Obot有一个非常棒的库，其中包含一个控件

<script type="text/javascript" language="javascript">
            function onlybackbutton(id) {                  

                  if (id == 1) {
                        document.getElementById('<%=txtCdatefrom.ClientID%>').value = "";
                        document.getElementById('<%=imgdatefrom.ClientID%>').click();
                  }
                  else if (id == 2) {
                        document.getElementById('<%=txtCdateTo.ClientID%>').value = "";
                        document.getElementById('<%=imgdateto.ClientID%>').click();
                  }
                  return false;
            }

      </script>



<table>
<tr>
                                          <td>
                                                Created Date From
                                          </td>
                                          <td>
                                                <asp:TextBox ID="txtCdatefrom" runat="server" Width="180px" onpaste="return false;" onmousedown="return onlybackbutton(1);" onkeypress="return onlybackbutton(1);"></asp:TextBox>
                                                <asp:ImageButton ID="imgdatefrom" runat="server" ImageUrl="~/images/DatePicker.gif"
                                                      ImageAlign="Baseline" Height="16px" />
                                                <asp:CalendarExtender ID="calsearchdtfrm" runat="server" Enabled="True" TargetControlID="txtCdatefrom"
                                                      Format="yyyy/MM/dd" PopupButtonID="imgdatefrom">
                                                </asp:CalendarExtender>
                                          </td>
                                          <td>
                                                Created Date To
                                          </td>
                                          <td>
                                                <asp:TextBox ID="txtCdateTo" runat="server" Width="180px" onpaste="return false;" onmousedown="return onlybackbutton(2);" onkeypress="return onlybackbutton(2);"></asp:TextBox>
                                                <asp:ImageButton ID="imgdateto" runat="server" Height="16px" ImageUrl="~/images/DatePicker.gif" />
                                                <asp:CalendarExtender ID="txtsearchdtto_CalendarExtender" runat="server" Enabled="True"
                                                      TargetControlID="txtCdateTo" Format="yyyy/MM/dd" PopupButtonID="imgdateto">
                                                </asp:CalendarExtender>
                                          </td>
                                    </tr></table>