3D objects are now being embedded within HTML pages without the need for additional software, such as browser plug-ins. However, 2D and 3D web content are still typically treated as separate entities with limited interaction. Our research presents a working prototype implementation of a dual-mode user interface for interactive 3D environments. The developed interface allows the user to instantly switch between a traditional hypertext interface and an immersive 3D environment that incorporates 2D HTML elements. The results from an initial user study show that 2D and dual-mode interfaces allow for quicker retrieval of information than 3D websites alone and result in higher user satisfaction.