Requires jQuery 1.2.2 and delegate plugin (both included in lib folder).

Changelog:

• Added AJAX-captcha validation example (based on http://psyrens.com/captcha/)
• Added remember-the-milk-demo (thanks RTM team for the permission!)
• Added marketo-demo (thanks Glen Lipka!)
• Added support for ajax-validation, see method "remote"; serverside returns JSON, true for valid elements, false or a String for invalid, String is used as message
• Added highlight and unhighlight options, by default toggles errorClass on element, allows custom highlighting
• Added valid() plugin method for easy programmatic checking of forms and fields without the need to use the validator API
• Added rules() plguin method to read and write rules for an element (currently read only)
• Replaced regex for email method, thanks to the contribution by Scott Gonzalez, see http://projects.scottsplayground.com/email_address_validation/
• Restructured event architecture to rely solely on delegation, both improving performance, and ease-of-use for the developer (requires jquery.delegate.js)
• Moved documentation from inline to http://docs.jquery.com/Plugins/Validation - including interactive examples for all methods
• Removed validator.refresh(), validation is now completey dynamic
• Renamed minValue to min, maxValue to max and rangeValue to range, deprecating the previous names (to be removed in 1.3)
• Renamed minLength to minlength, maxLength to maxlength and rangeLength to rangelength, deprecating the previous names (to be removed in 1.3)
• Added feature to merge min + max into and range and minlength + maxlength into rangelength
• Added support for dynamic rule parameters, allowing to specify a function as a parameter eg. for minlength, called when validating the element
• Allow to specify null or an empty string as a message to display nothing (see marketo demo)
• Rules overhaul: Now supports combination of rules-option, metadata, classes (new) and attributes (new), see rules() for details