Hi,
The examples in w3 page don't work. I do copy and paste and create exactly same database but nothing changes. It returns "Error on Page" error.
http://www.w3schools.com/php/php_ajax_database.asp
http://www.w3schools.com/php/php_ajax_responsexml.asp
http://www.w3schools.com/php/php_ajax_livesearch.asp