this script i grabbed from coolite(old) version messageBox overview example. it's pretty cool notification and can we use this script for new version of EXT ??
Ext.Net = function ()
{
    var msgCt;

    function createBox(t, s)
    {
        return ['<div class="msg">',
			'<div class="x-box-tl"><div class="x-box-tr"><div class="x-box-tc"></div></div></div>',
			'<div class="x-box-ml"><div class="x-box-mr"><div class="x-box-mc"><h3>', t, '</h3>', s, '</div></div></div>',
			'<div class="x-box-bl"><div class="x-box-br"><div class="x-box-bc"></div></div></div>',
			'</div>'].join('');
    }

    return {
        msg: function (title, format)
        {
            if (!msgCt)
            {
                msgCt = Ext.DomHelper.insertFirst(document.body, { id: 'msg-div' }, true);
            }
            msgCt.alignTo(document, 't-t');
            var s = String.format.apply(String, Array.prototype.slice.call(arguments, 1));
            var m = Ext.DomHelper.append(msgCt, { html: createBox(title, s) }, true);
            m.slideIn('t').pause(1).ghost("t", { remove: true });
        },

        init: function ()
        {
            var t = Ext.get('exttheme');
            if (!t)
            { // run locally?
                return;
            }
            var theme = Cookies.get('exttheme') || 'aero';
            if (theme)
            {
                t.dom.value = theme;
                Ext.getBody().addClass('x-' + theme);
            }
            t.on('change', function ()
            {
                Cookies.set('exttheme', t.getValue());
                setTimeout(function ()
                {
                    window.location.reload();
                }, 250);
            });

            var lb = Ext.get('lib-bar');
            if (lb)
            {
                lb.show();
            }
        }
    };
} ();
i have unclear use of this snippet

Ext.DomHelper.append(msgCt, { html: createBox(title, s) }, true);
if we can use this how can i modify this code for working.