I've created a dynamic drop down menu that populates itself with data from a MySQL table. What I would like to do is create a non dynamic drop down menu that alters what is shown in the dynamic menu.

For example, the first menu has three cities London, Paris, New York. If I choose London it populates the second menu with people from London.

Here is the code I have for my dynamic menu

Code:
<td valign=top><strong>Name:</strong></td>
...