title: How to save the select history of a html form with multiple select drop down lists
body: <p>I have created a wizzard with multiple forms. A user of the wizard can traverse through the forms back and forward using navigation buttons.
  One of the forms contains multiple drop down lists, where the options in a list depends on the previous selection. Every option list is created using a webservice query. 
  A user can always change a previous selection.</p>
  
  <p>When all selections have been completed by the user, the form is submitted and the user enters the next form.
  My question: how to save the select options history. We need this history including all the options in the drop down lists, if the user decides to go back to this form to modify his selections.</p>
  
  <p>My own solution: saving the form (dom) instance ( in a cookie?). Is there a good alternative?</p>