Remembering which tabbed panel I left

Question

I have a web page that uses several Spry tabbed panels to display different sub-sets of volunteers who have applied to volunteer at an airshow. Alongside each volunteer is a link to a page that allows an administrator to edit the volunteer information, that is the user could have started from any one of 4 tabs and gone to the same page to edit the volunteer info. When the edit is complete it returns to the original web page and opens the default tab, I'd like it to return to the original web page and open the tab it left. I have read http://foundationphp.com/tutorials/spry_url_utils.php and think I understand it, but before I can do that I need to pass the tab number from the original page to the edit page, and then when the edit is complete pass that back to the original page.
I think I know how to pass the tab number to the edit page - I'd add &tab=x to the link URL (where "x" is the tab number I'm leaving). The problem I'm having is figuring out how to access that parameter in the edit page and then send it back when the edit is complete.
To see what I mean look at www.hollisterairshow.com/login.php and use username "q" and password "q" without the quotes, this will take you to the Control Panel or "original web page" I referred to above. Look at any/all of the "Volunteer" tabs and you'll see they all provide a link to an "editvolunteer.php" page. When the edit is complete I'd like the user to be returned to the Control Panel and in the tab they were in.
Thanks for any suggestions,
Tony

Answer 1

Hi Tony,
You will need to use cookies for this. Normally I point to Arnout Kazemier's page for this but it has been down for some time now.
Dooza(Steve) seems to have found a solution, just not sure what, but have a look here http://forums.adobe.com/message/3281366#3281366
If you send Steve a PM he will probably help you out.
Ben
PS: in case you need it, the following is SpryCookie.js
Spry.Utils.Cookie = function(type /* string*/, name /* string */, value /* string or number */, options /* object */){
     var     name = name + '=';
     if(type == 'create'){
          // start cookie string creation
          var str = name + value;
          // check if we have options to add
          if(options){
               // convert days and create an expire setting
               if(options.days){
                    var date = new Date();
                    str += '; expires=' + (date.setTime(date.getTime() + (options.days * 86400000 /* one day 24 hours x 60 min x 60 seconds x 1000 miliseconds */))).toGMTString();
               // possible path settings
               if(options.path){
                    str += '; path=' + options.path                   
               // allow cookies to be set per domain
               if(options.domain){
                    str += '; domain=' + options.domain;
          } else {
               // always set the path to /
               str += '; path=/';
          // set the cookie
          document.cookie = str;
     } else if(type == 'read'){
          var c = document.cookie.split(';'),
               str = name,
               i = 0,
               length = c.length;
          // loop through our cookies
          for(; i < length; i++){
               while(c[i].charAt(0) == ' ')
                    c[i] = c[i].substring(1,c[i].length);
                    if(c[i].indexOf(str) == 0){
                         return c[i].substring(str.length,c[i].length);
          return false;
     } else {
          // remove the cookie, this is done by settings an empty cookie with a negative date
          Spry.Utils.Cookie('create',name,null,{days:-1});