I believe this is HTML5, jQuery Related function
if you want to change the message from server side then you can use AJAX
check this url
http://jqueryfordesigners.com/coda-popup-bubbles.1.html

hi I want to use this popup - when a user adds a new item in the cart. Here page will not be directed to a cart page instead on the same page a box on the upper side will appear which will say - 1 more item has added along with the small added text that will show total number of items in the cart.
This popup will hide automatically after a few seconds, allowing the user to add more item into the cart or check out.

can anyone please help

Hey Suneet - I've already answered how to do it.

I assuming you add to your cart with an AJAX call. In the script that you call, you'll need PHP to output the information you want in the message (1 more item added and total number of items in the cart). You then need to put the code I posted into the success() or done() function of the AJAX call.

If you want to post your PHP script that adds to the cart and the jQuery code for adding to a cart, then I can take another look.

I've requested that this question be deleted for the following reason:

My Subscription has ended so I removing my question

Suneet,

Please don't just delete question, particularly when Experts have spent the time helping. Either continue to engage with them or accept an answer.

I've offered you the code to solve your problem.