This is entirely HTML/CSS/JavaScript. There are no plugins involved (like Flash, Java, or Silverlight). Everything has hover effects. Events fire immediately, and there are no page reloads when things happen. Instead of a page reload, the JavaScript immediately alters the DOM on the current page. Any data calls will be done asynchronously in the background, and that part is what we're working on next.
One interesting benefit of a browser is that the user can change the magnification of the entire program without any problems at all. Also, everything is designed with more of a flow pattern than a fixed layout. That may result in some less efficient layouts sometimes, but for the most part it will allow more flexibility.
The portal part is nice for patients to be able to review payments, procedures and past appointments. A read only copy of the schedule which can be viewed by the patients ;instead the real one -will probably do the trick. Some logistic can be applied to a form that can search for provider availability and procedure in question; and then suggest a couple of openings. If the server is hosted at the office, I would assume that security certificates will have to be implemented to secure the online transaction. I don't think that self signed certificate will do the trick.
