Run click event of image button

[jay123]

hello,
i m new to javascript and i think what i am trying to do cant be accomplished w/o it.
i am using ajax modelpopupextender and using OnOkscript="OnOk()" .
now in OnOk(), i m trying to run a click event of some button(image button)

coding is

ajax control

<cc1:ModalPopupExtender ID="ErrorPopup" runat="server" PopupControlID="PopupPanel" BackgroundCssClass="backclass" TargetControlID="CancelButton" OkControlID="OkButton" OnOkScript="onOk()"
                  CancelControlID="CancelPopButton"></cc1:ModalPopupExtender>

ONOK()

 <script language="javascript" type="text/javascript">
    function onOk()
    {     
        document.getElementById("<%= CancelButton %>").OnClick();  
 
    }

and the button it is trying to run

<asp:ImageButton ID="CancelButton" runat="server" skinid="buttonCancel" OnClick="CancelButton_Click" CssClass="button" />

error i am getting is cancelbutton NUll

i have tried it with1) replacing cancelButton text with something like ct100blah..... 2) Onclick with Click

nothing seems to work

any help..

[acoder]

Show the client-side versions of your code. You can use the click() method (note the lower-case).