Web sites are complex and heterogeneous systems, characterized by a large number of employed technologies. Evolving these systems requires the skills of a "renaissance reverse engineer." In order to assist reverse engineers in their efforts, new program analyses need to be developed that are specifically tailored to the unique task of Web site reverse engineering. To illustrate the design space for program analyses, we introduce a classification based on dichotomies and discuss each of them in the light of Web site reverse engineering. The main contribution of this paper is a better understanding of the program analyses features for Web site reverse engineering.