How to set focus custom image button after click that button

Question

My problem is ..

I want to set focus at custom image button.

If I click that button, a form will be open,after I close that form, the button that I clicked should be on focus.

 

<asp:TemplateColumn ItemStyle-Width="95px" ItemStyle-HorizontalAlign="Center">
                     <HeaderTemplate>
                      <table style="width: 95px">
                       <tr>
                        <td style="text-align: center; width: 100%">
                         &nbsp;
                        </td>
                       </tr>
                      </table>                    
                     </HeaderTemplate>                    
                     <ItemTemplate>
                      <table style="width: 95px">
                       <tr>
                        <td style="text-align: center; width: 100%">
                         <cc1:CustomImageButton id="SoDtilButton" runat="server" type="submit"
                          ImageUrl="img/CM_b2_detail.gif"
                          AlternateText="Detail"
                          CommandName="Dtil">
                         </cc1:CustomImageButton>
                         <cc1:CustomImageButton id="SoDeleteButton" runat="server"
                          ImageUrl="img/CM_b2_delete.gif"
                          AlternateText="Delete"
                          CommandName="Delete"
                          ClientFocusScript="defaultFunctionKeyBody"
                          ClientClickScript="delRowConfirmDialog">
                         </cc1:CustomImageButton>
                        </td>
                       </tr>
                      </table>
                     </ItemTemplate>
                     <edititemtemplate>
                      <table style="width: 95px">
                       <tr>
                        <td style="text-align: center; width: 100%">
                         <cc1:CustomImageButton id="EditSoDtilButton" runat="server"
                          ImageUrl="img/CM_b2_detail.gif"
                          AlternateText="Detail"
                          CommandName="Dtil"
                          ClientFocusScript="defaultFunctionKeyEdit"
                          Visible=true>
                         </cc1:CustomImageButton>
                         <cc1:CustomImageButton id="EditSoUpdateButton" runat="server"
                          ImageUrl="img/CM_b2_update.gif"
                          AlternateText="Update"
                          CommandName="Update"
                          ClientFocusScript="defaultFunctionKeyEdit"
                          ClientClickScript="updateSoRowCheck">
                         </cc1:CustomImageButton>
                         <cc1:CustomImageButton id="EditSoDeleteButton" runat="server"
                          ImageUrl="img/CM_b2_delete.gif"
                          AlternateText="Delete"
                          CommandName="Delete"
                          ClientFocusScript="defaultFunctionKeyEdit"
                          ClientClickScript="delRowConfirmDialog">
                         </cc1:CustomImageButton>
                        </td>
                       </tr>
                      </table>
                      <input id="EditSoQtDecFlgHdn" type="hidden" runat="server" NAME="EditSoQtDecFlgHdn">
                     </EditItemTemplate>
                    </asp:TemplateColumn>

 

 

 Button is created like that.