From a popup window hide a control on the parent page

From a popup window hide a control on the parent page
I have a parent page and child page
I want to do 2 things
1. display the popup when I hide the dropdownlist that is on the parent page
2. when the user closes the popup dropdownlist I show this in the parent page
ddlDesicionOferta called control
and when you build your html is called tbContenedor_tab4_ddlDesicionOferta

this is the hml
                             <td class="txtazul" align="left" style="height: 21px">
                                                    Conclusión de Mi Evaluación :&nbsp;
                                                    <asp:DropDownList ID="ddlDesicionOferta" runat="server" Width="266px" CausesValidation="True">
                                                    </asp:DropDownList></td>
                                            </tr>
                                        </table>
                                    </ContentTemplate>
                                </asp:UpdatePanel>
                            </ContentTemplate>
                            <HeaderTemplate>
                                Mi Evaluación
                            </HeaderTemplate>
                        </cc1:TabPanel>
block-dropdownlistHTMgenerated.txt
enrique_aeoAsked:
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BadotzConnect With a Mentor Commented:
From the popup window, add:

var wp = window.parent; // Might be window.opener, I can't remember

Now anything within the parent window is available to the popup through "wp":

alert(wp.document.getElementById("SOME_HTML_ELEMENT_ON_THE_PARENT").tagName);

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BadotzCommented:
The strong, silent type, eh?

No worries - glad to help.
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