AJAX in jsp with Database

hi friends,
I am doing project in jsp with database. in my jsp page one textbox is there. when ever use enter the customer name it will display the related names like autocomplete textbox (like google search bar). in this i want use ajax . but its wondering i donot know how to use i referred number of websites. plz..... help me some body. i have "ajaxanywhere.jar file". but i donot know how to use plz.... provide solution with ajaxanywhere.jar file or any another way.

thanks in advance