Hello Kit Cloudkicker !

The on_copyright_click function doesn't have the list of parameters. So you need to call the following code:

$(document).dolPopupAlert({

        message: your message,

        onClickOk: your function on click Ok button,

       onHide: your function for the Hide fog param

    });

There are no fog options in the given params. You need to change the style of id="bx-popup-fog" element.