Are You Sure? – a dirty forms check plugin
Chris Dance (codedance) at PaperCut Software
Are-you-sure is simple light-weight dirty forms JQuery Plugin for modern browsers. It helps prevent users from loosing unsaved form changes by prompting the user to save/submit. It's dependency free and designed for modern browsers... just the features you need and nothing more! See the project page and demo for usage and examples.
Ruben Torres
jquery plugin to detect when the fields of a form are modified