I'm using ASP to build two drop-down list boxes in an html page. The first drop-down contains a list of departments in my company. This is all being generated by running an ASP script that does a series of Response.Write commands. What I want to do is allow the user to select a department and then the second drop-down would be populated with users from that department. My problem is that when I trap the event from the department drop-down, I cannot find a way to fire off the ASP code to populate the other. Can you help? Example code would be great!