fetch information from a database with AJAX

[master3w]

I want to fetch information from a database with AJAX with two select box
like example
http://www.w3schools.com/php/php_ajax_database.asp but that contain
only one select box I want to do it using two select box when two select box select MySQL table will display as w3 example please help me to edit it for my need

[sunfighter]

In the example, your sending the value of the drop down with onchange="showUser(this.value)"
Simple add a second parameter to identify the dropdown that is sending a value:
onchange="showUser(this.value, 'first')"
Use onchange="showUser(this.value, 'second')" for the other dropdown.

In the JS code have an IF statement to check IF both dropdowns have a value and than send your query.