JQUERY/PHP search and display employee data

JQUERY/PHP search and display employee data

I wanted to do a search addressbook and display the results without refreshing the page. I am told that it can be made using jQuery. I have a fairly good understanding of php and my data is stored in mysql. Its woking should me some what: User enters an employee id. As he leaves the textbox, details of the employee are to be filled in the relevant text boxes.

how to create a jQuery ajax request and how to receive and display the data into different form fields>