I have a form with 3 textareas and some other fields. I would like to put in an autosave functionality and found the Autosave module. But that seems to be specifically for editing nodes and is also too advanced for what I need. I just need to save the contents every 3 seconds or so, no revision support or anything fancy like that.
But something like this must have been done before, so is there an example or some pointers on how to implement this? I'm using Drupal 7.