$('#dialog').dialog({
        bgiframe: true,
        resizable: false,
        height:140,
        modal: true,
        overlay: {
            backgroundColor: '#000',
            opacity: 0.5
        },
        buttons: {
            'Delete all items in recycle bin': function() {
                $(this).dialog('close');
            },
            Cancel: function() {
                $(this).dialog('close');
            }
        },
        close: function(event, ui) {
            alert("close trigger");
        }
    });