Need a notification module

Avg Bid (USD)
Project Budget (USD)
$10 - $30

Project Description:

I just need a notification module for my website.
There is a database(MySQL) and a table where all the notifications are stored and managed. Also i have a notification icon in my website which will display all the notification when it is clicked. This is already taken care.

But what i am currently looking for is-
1. Auto pooling of unread notifications from the database and display the count to user as soon as a notification is updated in the database for the respective user.
2. A toaster notification message at the right-bottom stacked one by one top for every new notification getting updated to the database for the respective user.

Key Consideration:
1. Your approach and code should never slow down the performance of client and server
2. Should be cross-browser and platform compatible
3. Should have clean and self explainable code.
4. Technology can be used are - PHP, MySQL, AJAX, JQuery
5. The notification table have the following fields- notification ID (autonumber) , notification timestamp (2013-06-11 23:41:53 format), notification message (TEXT), Notification from (user ID) , notification to (user ID), Notification viewed (1 or 0) , Notification expired (1 or 0)

Skills required:
AJAX, jQuery / Prototype, MySQL, PHP, Software Architecture
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