javascript - On toggle Hide/show -

i have code. if user press on lets burger , add session basket. reload of page doesn't open current window view(toggle)

how can make open current again on reload...

<script type="text/javascript"> function unhide(divid) {     var item = document.getelementbyid(divid);     if (item) {         item.classname=(item.classname=='hidden')?'unhidden':'hidden';     } } </script> 

this how show/hide text.

<a href="javascript:unhide('sandwich');"></a>  <div id="sandwich" class="hidden"> here go 1 </div>  <a href="javascript:unhide('burger');"></a>  <div id="burger" class="hidden"> here go 2 </div> 

things not persistent across page reload / refresh.

there 2 basic approaches it:

• session cookie , session on server, communication via ajax
• store in cookie

both require work, it's unavoidable.
for cookie part, there's nice jquery plugin called jquery.cookie.