A jQuery plugin to convert normal HTML forms into AJAX forms simply. It Ajaxifys your HTML Form with this plugin. No change will be required on Server-Side.

• Auto form detect. So, when you use Element ID in $('') "example: $('#ID')" the plugin will check if that is a Form ID or not. if not, it will search inside to get the form.
• Sends the form data to "Action" url using "Method" submit method (post, or get)
• Works and tested on IE6+, Firefox (Mac, Windows), Chrome (Mac, Windows), Safari, Opera and all major browsers.
• Works fine with Dynamic forms
• Lightweight (~3KB)
• Easy to understand.
• Cool for site owners.
• Work with any CMS.. No server side changes required. Just add the script and run it.

its simple as:
$('#form').alajax({ OPTIONS });
OR
$('form').alajax({ OPTIONS });
OR
$('#div').alajax({ OPTIONS });

options are:

• type: '' // Type of return value. Default is "text" and takes other values like: "json", "xml", "jsonp"
• beforeSend: function (){} // Code to run before sending the form
• success: function(){} // Code to run when the AJAX call success
• error: function(){} // Code to run when error occures

For more information, please visit: ALAJAX website