This jQuery ajax upload plugin creates a hidden iframe and sets the form’s target attribute to post to that iframe. When the form is submitted, it is posted (including the file uploads) to the hidden iframe. Finally, the plugin collects the server’s response from the iframe.
Free jQuery plugin for creating tree menus, designed to be easy to use but offer powerful options. Features include persistance, drag ‘n’ drop, lazy loading and themes
Change the type of submit to button in the form set this plugin, you will get validations via ajax and direct drawing. And jQuery UI Dialog will be available to you more effectively!