hi,
below is my code and modal pop up is displaying on the page when page load.
its suppose to pop up when button click
<!--popup-->
<asp:Label ID="lblpopup" runat="server" Visible="false"></asp:Label>
<asp:Button ID="btnShowPopupAppointmentadd" Style="display: none;" runat="server" />
<ajax:ModalPopupExtender ID="CustomerListExtender" runat="server"
CancelControlID="btnClose"
TargetControlID="btnShowPopupAppointmentadd" PopupControlID="empupdatesearchpopup"
Enabled="True"
BehaviorID="MPEAdd"
BackgroundCssClass="modalBackground">
</ajax:ModalPopupExtender>
<asp:HiddenField ID="hidForModelAdd" runat="server" />
<asp:HiddenField ID="hdlDrId" runat="server" />
<!--popupend-->
<!-- pop up end here -->
<div id="empupdatesearchpopup">
<div id="searchpopuptopcloseforemployee" style="width: 850px;">
<div id="searchpopuptopimagepatient">
<asp:ImageButton ID="btnClose" runat="server" ImageUrl="~/Images/Icons/close.png" AlternateText="Close" />
</div>
</div>
<div id="searchpopupinnertopemployee" style="width: 850px;">
<div class="popupheaderlbl">
<asp:Label ID="lblCustomerSearch" runat="server" CssClass="popupheadersfont" style="color: white" Text="Edit Customer"></asp:Label>
</div>
</div>
</div>
<!-- pop up end here-->