(1)create table mystate : create table mysate (id int primary key auto_increment, state varchar(200) ); (2)create table mycity : Create table mycity (id int primary key auto_incrment, city varchar(200), state varchar(200) ); (3)insert some values in mystate & mycity .. (4)Now write code for db.php file: <?php $con=mysql_connect("localhost","root",""); mysql_select_db("ajax",$con); ?> (5)Now write code for drop.php file: <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Sections Demo</title> <script type="text/javascript" src="ckeditor/ckeditor.js"></script> <script type="text/javascript" src="http://ajax.goo...