It allows you to easily and unobtrusively upgrade HTML forms to use AJAX.
Jquery simple form validator
On the onsubmit event it will look in the form for input with pre-defined class selector, and validate them accordingly of their type. You have 2 choice of language, french and english. After it will put every error at the form bigenning in a simple list, and slide the scrollbar to this list.
Sort table rows using Ajax
Simple sort script using Stuart Langridge’s sortabe.js Some days ago I was looking for a good and simple way to sort data into a table with a simple click on table headers and I found this interesting framework: Stuart Langridge’s sorttable.js.
Handling Checkboxes, Radio Buttons and Select Options in jQuery
I figured I’d share how I’ve dealt with some form elements in jQuery. Sometimes you have to look at the docs a few times before you get what you can do, so I think these examples might help someone out there.
Prototype window login form

Demonstrates the use of prototype Window login form with RubyOnRails and Ajax.
NIce JForms

Form elements with beautiful shapes using lightweight jQuery JavaScript library.
Masked Input Plugin for jQuery

This is useful for fixed width input where the data follows a certain format.
JSValidate – Form validator
Simple to configure form validator built on prototype and scriptaculous libraries.
Validate Forms (jQuery)

Forms are such a common element on the Internet we tend to blunder through them without too much thought. However, if the web site has added a few nice touches that make the process easier, it tends to speed up the process and reduce any frustration in finding our preferred username (i.e. try getting your [...]
Auto-Populate Select Fields (jquery)

If you are familiar with using select boxes for categorisation and sub-categories, such as ebay does when selling an item, usually this can require a lot of JavaScript to maintain the select boxes, but jQuery can hugely simplify this task by adding a dash of AJAX.
Expand/Contract a text area (mootools)

Just make a form, and this script will add the ability to resize each textarea…if you want to
jQuery Password Strength Meter

Similar to Google, it provides the user with feedback of how strong their password is.
