using Jquery to get data in MySQL and put it in a textarea

using Jquery to get data in MySQL and put it in a textarea

Greetings, I´m Caio speaking from Brazil... and I start to use JQuery and see how is really simple...! I just have a question that I couldn´t find in documentation or here in the forum, and I will appreciate your attention to try to resolve it.
 
First I have a PHP Script that is a combobox with a several textareas. What I would like to do is, select a data in combobox and it will get some data in MySQL database and put it the textarea inputs.
 
The combobox is from name of persons, and the textareas is address, telephone, email, etc... all of them are in MySQL database.
 
Is anyone knows how can I do it? Is there any tutorial that I didn´t see?
 
Thanks for help and attention.