Saving web form data to file

If you want to use webpages and DHTML to do experiments or fill out questionairs, the problem is saving the data to a file on the hard drive for statistical analysis. If your web-form is on a online webpage this not too difficult (e.g., using a mail-form—see this page). But if you want to collect data offline, you would like to able to save those data to a file on the hard drive. How to get access to the hard disk from within a webpage is explained here, but it is more convenient to have javascript code that works for any form on a webpage. To this end I created a Javascript object that gathers the data from a form, and—in Internet Explorer—can write it to the hard disk in the comma separated values (".cvs") format. Part of the code is based on code from this website. An example and a detailed explanation can be found here. A zip file containing the .js library file and the example and documentation can downloaded here.