TextExt is a plugin for jQuery which is designed to provide functionality such as tag input and autocomplete.TextExt’s modular design allows you easily turn a standard HTML text input into a wide range of modern, tailored to your needs input field without bloating your source code and slowing down your site with the code that you aren’t using.A wide number of plugins are available including Tags, Autocomplete, Filter, Ajax as well as a few which are purely aesthetic like Focus.
Ajax Forms Plugins