Cache web forms in client side

is it possible to cache form contents on client side? Like maintaining state even if the form is un-saved and the user moves to a new page then returns back to 开发者_开发知识库the form?

The best way to do this would be by using Javascript/AJAX to talk to the server, saving each form field as the user went off it. Then, when you load the page, you'd see if there was any content for each form already saved.