The World Wide Web provides a variety of information and services, however, its usability is still under discussion. In order to clarify concrete difficulties in Web use, the behavior of younger and elderly users was observed with eye tracking during a timetable search task using electronic timetable systems on the Web. The result shows on the one hand common difficulties for younger and elderly users caused by an inconvenient navigational structure and an inappropriate page design. On the other hand, several important differences between the two age groups are confirmed. It suggests the necessity of particular consideration for elderly users in Web design.