I have two ModalPopupExtender on btnAdd click event i want to activate one or them on specific condition how can i do it.
<cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server"
cancelcontrolid="Div2" okcontrolid="btnOkay"
targetcontrolid="btnAdd" popupcontrolid="Panel1"
popupdraghandlecontrolid="PopupHeader" drag="true"
>
</cc1:ModalPopupExtender>
<asp:panel id="Panel1" style="display: none" runat="server" >
<div class="popup_Container" style="size:auto">
<div class="popup_Titlebar" id="Div1">
<div class="TitlebarLeft">Popup Header</div>
<div id="Div2"class="TitlebarRight" ></div>
</div>
<iframe id="frameeditexpanse" frameborder="0" src="StoreDataFrom/frmStudentProspects.aspx"
scrolling="auto" style="width:550px; height:500px;"></iframe>
</div>
<input id="btnOkay" type="button" value="Done" />
<input id="btnCancel" type="button" value="Cancel" />
</asp:panel>
<cc1:ModalPopupExtender ID="ModalPopupExtender2" runat="server"
cancelcontrolid="Div4" okcontrolid="btnOkay"
targetcontrolid="btnAdd" popupcontrolid="Panel2"
popupdraghandlecontrolid="PopupHeader" drag="true"
>
</cc1:ModalPopupExtender>
<asp:panel id="Panel2" style="display: none" runat="server" >
<div class="popup_Container" style="size:auto">
<div class="popup_Titlebar" id="Div3">
<div class="TitlebarLeft">Popup Header</div>
<div id="Div4"class="TitlebarRight" ></div>
</div>
<iframe id="Iframe1" frameborder="0" src="StoreDataFrom/frmCategory.aspx"
scrolling="auto" style="width:350px; height:105px;"></iframe>
</div>
<input id="Button1" type="button" value="Done" />
<input id="Button2" type="button" value="Cancel" />
</asp:panel>