Use of jQuery in comercial project

Use of jQuery in comercial project

I am using [jquery-1.8.3.js / jquery-ui-1.9.1.custom.js/ jquery.jqGrid.src.js/ json2.js] in my commercial product.

I am not going to modify anything from this file. I just need to use the api.
Do I need to get any extra license for this?
Or Need to inform about to jquery team?

I am planing to give explanation about jquery which is under MIT license in my README.TXT file.
Is their any need to explain it in README.TXT?

if yes then please guide me what will be the content of README.TXT file.

If no still I want to add explanation in README.TXT then what will be the standard format (Content) which need to be added.