Refreshing parent page from a child page

I am straggling to refresh parent page on close of modal dialog. Lots of searching and doing rnd I have found following solution. Using following solution you can refresh the parent page and you can also give the text notification.

<script type="text/javascript">

    function demoCallback(dialogResult, returnValue) {

        SP.UI.Notify.addNotification('Your Notification Here...');

        SP.UI.ModalDialog.RefreshPage(SP.UI.DialogResult.OK);

    }

    function popup() {

        var options = {

            url: add_request.aspx',

            tite: 'Add Request',

            allowMaximize: true,

            showClose: true,

            width: 400,

            height: 300,

            dialogReturnValueCallback: demoCallback

        };       

        SP.UI.ModalDialog.showModalDialog(options);

        return false;

    }

</script>