title: Remember Collapse/Expand state of section when using browser back button
body: <p>I have several section on my website. I allow the viewer to expand/collapse the sections individually. The sections are expanded with javascript (jquery / zepto). (There is a button for each section to expand it or to collapse it.)</p>
  
  <p>If the viewer leaves the page to view a linked document and then returns with the back button of the browser, all sections are collapsed.</p>
  
  <p>I could store the state of the sections in a cookie. But I don't think the cookie is read when the viewer comes back to the page with the back button...
  Is there a way to remember the state (expanded/collapsed) of the sections?</p>