Abstract: A method for providing client-side interportlet communication includes: executing an even manager, generated at a portal server, on a client device hosting a portal page for providing interportlet communication to portlets contained in the portal page; receiving at the event manager running on a client device a registration request from each of the portlets when the portal page containing the portlets is loaded; and receiving at the event manager an event set off by one of the portlets wherein the event is defined by a token published by the one of the portlets. If the token defining the event matches the published token defined in a behavior of the portal page, the method also includes invoking at the event manager callback functions of one or more of the portlets having at least one subscription token that matches the corresponding subscribed token defined in the behavior.