Realizing a Mashup Environment based on a Web Contents Viewer with Variable Opacity and Event-Transparency
We implemented a Web Contents Viewer that provides users a mashup environment. The viewer has one or more layers,
which display web pages or web applications. Users can change order of layers on a desktop screen and can set a layer order
to specified positions, top-most, above-desktop, and under-desktop positions. Users can also change the transparency of a
background of layer. Moreover, users can blend contents and events among multiple distributed layers. The system provides
Web APIs to control such properties.