An Internet based help system for establishing substantially real-time help dialog over the Internet between a client who has a question about a subject and a selected expert knowledgeable in that subject. The method includes displaying a screen used to specify usenonuse of each of the plurality of network controllers, and setting at least one of the plurality of network controllers, to which the use is not specified on the screen, in a disabled state. In addition, photoreceptors and image-forming apparatus including such silicon-containing layers are provided. In another mode, the OLED can detect energy by converting incoming photons or energy into an electrical signal by the photoelectric effect. An insulating mat is positioned between the substrate and the inner shell and includes a reduced diameter portion compressing the insulating mat between the inner shall and the substrate.