Case 3 :
Web Developer defines back button in page
This page does not have <div> footer in html file
but declared back button in page
Framework generates footer then attach back button to footer
<div data-role="page" data-add-back-btn="footer">
<div data-role="header" data-position="fixed">
<h1>back button sample</h1>
</div>
<div data-role="content">
</div>
</div>