The implementation of popups in intercept surveys is a commonly used sampling method for data gathering purposes. As advertisements are using the same technique for distribution, popups are becoming increasingly unpopular. Due to the development and increasing use of popup blockers in the most common browsers and in security software like firewalls, the possibility of reaching participants is decreasing. Similarly, there is a tendency for internet users to learn to ignore unexpected popups. To overcome these problems and to call the user's attention to possible participation we propose to intercept the user in his or her navigation behaviour. Clicking on a link leads to an interception page where the user is informed about the survey. Either an action of the user or a timeout leads to the previous destination page or the survey. After completing or abandoning the survey, the user is then directed to the previous target page. Avoiding popups and implementing this active user sampling method leads to several advantages: (1) Only users who actively navigate through the promoting website are invited, (2) the invitation may be build in accordance with the links and topics users choose, (3) users are more prone to actively react to the interception page. The paper integrates and explores the use of dynamic pages, javascript, cookies and other session management and user identification tools into a framework for an active user sampling method. A case study conducted to evaluate an information portal demonstrates the information flow needed for implementation. Fallback methods will be discussed to allow for the variety of browsers and system configurations to fit into the framework as well as to maintain the user experience of the website.