http://view.jquerymobile.com/1.3.1/demos/widgets/panels/panel-fixed.php

I am trying to build a website that uses a left side panel menu.  When the page is open in a large window (on a computer) I want the panel to stay open.  When the page is open on a small window, I want the menu to be closed until the user opens it.  It sounds to me like I should be able to just add class="ui-responsive-panel" to the page container, but this does not work.

Any ideas would be appreciated.  I have already tried all of the ideas in this thread:

http://stackoverflow.com/questions/14960044/jquery-mobile-forcing-panel-open-on-wider-screens

Thanks!