When an error needs to be displayed, this script creates a div and positions it in the top right corner of the input. This way you don’t have to worry about your HTML form structure. The rounded corners and shadows are pure CSS3 and degrade well in non compliant browsers.
With this highly customizable plugin the user can set his own class to define the rule, set events onError and OnValid for a particular class and you can also add their own effects, may be jquery animate().
Highly Customizable Form Validation »
jTip pulls content into a tool tip using the HttpXMLRequest object. By adding a class attribute value of “jTip” to a link element you can create a tooltip from the content found in the file the href is pointing too.
This plugin helps you to easily create form validations with high flexibility and is a packaged with a huge set of options.
jQuery Live Form Validation »
Valid8 – An input field validation plugin »
The Original jQuery Plugin
And if all of the rest of the plugins on this page can’t help, you can always rely on the original jQuery form plugin: jQuery Form Plugin »