The jQuery Mobile framework parses the link's href to formulate an Ajax request called Hijax in jQuery Mobile vocabulary. Note that the targetted page has to begin with data-role='page' and follows jQuery Mobile page structure
This links to a regular HTML page. Note that the linked page does not follow jQuery Mobile page structure, and wiil show up blank
This button takes us back to calling page. Note that by adding data-ajax="false", we can ensure that this page does not get encorporated into the jQuery Mobile framework.