Submit Killer is a jQuery plugin that allows you to prevent normal form submission easily. It can be useful when you perform form validation or something like this, and need to control form submission programmatically. If the user have JavaScript disabled, the form will not be broken, but normal submission will be performed instead of this.

Resources:

http://vladimir-k.blogspot.com/2008/12/submit-killer-jquery-plugin.html - homepage

http://phone.witamean.net/submit-killer/ - demo page

http://plugins.jquery.com/project/submit-killer - Submit Killer in jQuery plugins directory