The Universal Related Popup Menus (URPM) consist of two popup menus with matching submit buttons controlled by JavaScript and CGI. The left popup (menu1) is the "subject" menu and contains the main areas of the site (in this case WebReference.com). The right menu is the "topic" menu and contains the topics grouped under each subject. The topic menu defaults to topics under the first subject. In this case it lists the current experts on the site.
