| 摘要 |
A network device comprises a Web service provider. In order to cause a client having a function as a Web browser in a network to display a series of multiple pictures, the Web service provider sends the client in response to a request from the client a markup language file described in a predetermined markup language. The markup language file includes as elements thereof a plurality of layers corresponding respectively to the series of multiple pictures. The layer has a visibility attribute that defines whether or not the layer will be displayed on the client. The Web service provider includes a Web program generator that generates a Web program that operates on the client and appends the Web program to the markup language file. The Web program causes the client to implement a first function whereby the visibility attributes of the plurality of layers are modified to switch the picture displayed on the client without communicating with the Web service provider.
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