1. A physical machine readable storage medium stores a computer program product including programming instructions for performing the steps of: receiving a request for a Web application operation; dispatching the request to one of a locally deployed instance of the Web application or a remotely deployed instance of the Web application, wherein the step of dispatching the request is mediated by a method in a first page of the Web application, and wherein the request is selectively dispatched in response to first input data; and if, the request includes second input data for the Web application, the step of dispatching the request further comprises: reducing the request to a set of parameters in response to the second input data; and passing the set of parameters to the Web application, wherein an interprocess communication interface that intermediates between the method and the Web application and resides in an invisible frame of a page of the Web application selectively forwards responses received from the locally deployed instance of the Web application and the remotely deployed instance of the Web application to a target frame as specified by a parameter within the set of parameters included with the request.