roslibjs and rosbridge

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I want to connect a computer without ROS to a computer with ROS throught a browser use roslibjs, what need i do? I tried to change the simple.html. At the place of localhost:9090, i changed it to mycomputername:9090, it worked in local computer..but the connection is failed when i tried from another computer no-ROS. And what need i do to modify the port number?

SOS, thanks for help..