Tag selection in web page authoring is facilitated without losing the advantages of WYSIWYG editing. Flow passages are provided between adjacent plates, so that the oil flow passages alternate with the coolant flow passages, and the oil can flow from an oil inlet opening of each oil plate, and through the oil flow passage to an oil outlet opening, and coolant can flow from a coolant inlet opening of each coolant plate through the coolant flow passage to a coolant outlet opening. A system user requests a non-HTML file from a database using a web browser. Using the spatial orientation data, the processor determines in real-time the actual orientation of the surgical instrument relative to the anatomical reference points. The device information is associated with the accessory device, which may include a type identifier, a sequence identifier, and an Internet link.