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my ModalPopUp code is
<ajaxToolkit:ModalPopupExtender ID="ModalPopUp" runat="server" BackgroundCssClass="modalBackground"
                    CancelControlID="CancelButton" DropShadow="true" Enabled="true" PopupControlID="Panel1"

& In Panel One Text Box with 2 Buttons & i called this in Page load event.

my css file is:
    background-color: Gray;
    filter: alpha(opacity=70);
    opacity: 0.7;

    background-color: #ffffdd;
    border-width: 3px;
    border-style: solid;
    border-color: Gray;
    padding: 3px;
    width: 250px;

But while triggering ModalPopUp, opacity and bgcolor is not working(modalBackground:css class file is not triggering)

Help me to solve.

I was trying to view this in Chrome and Firefox. it is not working.
Updated 20-Jun-13 2:53am
Karthik Harve 20-Jun-13 9:05am    
where you are applying css class "modalPopup" ?
KuttiSankar 20-Jun-13 9:07am    
in Panel
<asp:Panel ID="Panel1" runat="server" CssClass="modalPopup">


try by rewriting the css class as below and check whether the style is applying or not.
    background-color: Gray;
    filter: alpha(opacity=70);
    -moz-opacity: 0.7;
    opacity: 0.7;

because, property opacity will not recognize in Mozilla, so you have to write as -moz-opacity.

hope it works.
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KuttiSankar 20-Jun-13 9:28am    
No dude it is not working...
Karthik Harve 20-Jun-13 9:36am    
which browser are you using ? which CSS version ?
Hi I have check your code in my test page solution and its work fine. May be check if your css file is properly attached with page(or u can check in firebug or developer console that css is attached loaded or not).
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KuttiSankar 21-Jun-13 5:27am    
I hope Css is not loading and don't know how to fix this. still i'm trying
Kalpesh Kumar Joshi 21-Jun-13 8:43am    
Did you add <link></link> tag in your page to load CSS file?, and also check href path of link tag is proper or not.
some time adding "../" to href path can load the stylesheet.
Also you can check it by clicking on stylsheet link in developer console in browser.

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