Question

I am trying to change the jQuery-ui dialog overlay image with a button click from inside the dialog, but in the code below the overlay image does not change. I need to edit the CSS of the overlay dynamically in the click event.

$("document").ready(function(){
    var divCustom = '<div id="myOverlay">
                         <div id="button1">button1</div>
                         <div id="button2">button2</div>
                     </div>';

    $(divCustom).dialog({ height: 400, width: 700, modal: true });

    $("#button1").click(function(){
        $("#myOverlay .ui-widget-overlay").css({ 
            "background-image": "happy.gif"
        });
    });

    $("#button2").click(function(){
        $("#myOverlay .ui-widget-overlay").css({ 
            "background-image": "sad.gif" 
        });
    });

});     

Answer 1

Cannot test this without JSFiddle but probably the following should help:

$("#myOverlay .ui-widget-overlay").css({ "background-image": "url(happy.gif)" });