PROBLEM TO BE SOLVED: To make performable a collaboration work wherein operations on one end on various contents are synchronously transmitted to the other end as the same item is viewed via a network.;SOLUTION: A collaboration server is provided with an event data receiving means for receiving, via a network, event data on an operated WWW browser transmitted from a host client connected to the network, an event data storing means for storing the event data received by the event data receiving means, an event data transmitting means for transmitting the event data stored in the event data storing means to a guest client connected on the network 3, an event success or failure message receiving means for receiving, via the network, an event success or failure message transmitted from the guest client, and an event success or failure message transmitting means for transmitting the success or failure message received by the event success or failure message receiving means to the host client.;COPYRIGHT: (C)2004,JPO
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