Hi:
In addition to Scott's suggestion, it -is- possible to insert JavaScript into your ODS HTML created pages. SAS does not provide any JavaScript to create drop down menus, etc, but the methods for doing so with either JavaScript or vanilla HTML are pretty straightforward. If you search on support.sas.com (search box is in upper right hand corner of every support.sas.com page - including the forum page) for the string
ODS HTML Javascript
...you will come up with many hits, these among them:
http://support.sas.com/kb/23/645.html
http://www2.sas.com/proceedings/forum2008/266-2008.pdf
The task gets even easier if you have SAS/IntrNet and htmSQL or the Enterprise BI Platform, Integration Technologies and Stored Process capability.
cynthia