Simple sliding image popup effect needed

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I need a simple piece of code that does the following:

When $new_item_in_cart == 'true'

It displays a simple popup image called $popup_image that slides open, stays open for a few seconds, and then slides shut.

I can give you examples of what I need.

I cannot allow access to our source code So I just need this to work on a very simple php page which I will provide. The popup image can use javascript, AJAX, or PHP to work. The popup image MUST be displayed over the website and MUST NOT effect the layout of the design. I just want it to work like a tool tip does except I want it to slide open slowly when the page loads, stay open for a few seconds, and then close slowly. The image MUST appear right below the shopping cart icon in our header every time.

I will provide an example of a website that already does this in the PMB.

This popup image must work with IE7+, FireFox 2.0+, and Safari on Windows XP, Vista, and Mac.

Skills required:
AJAX, Javascript, PHP
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