Saving Partial Form Progress

I am about to start coding an HTML form that is rather long. I would really like to see an option for my clients to 'save and complete later' the partial form. I would like them to

Solution 1:

Would some javascript something like http://garlicjs.org/ do?

Solution 2:

You need to save the data persistently for example in a file or in a database, then extract it later when the user returns. The login functionality with username and password is a complex issue involving numerous topics. I don't really know your coding background but judging from your question it seems you should look into learning programming basics and concepts. PHP is a very popular webprogramming language where this functionality is commonly used.