A system and method downloads a document from a server computer to a client computer. The method and system comprises the steps of repackaging scripts in a document program at the server such that scripts are in a program location no earlier than the program location of a first corresponding data element and downloading the repackaged document program to the client. The method renders rendering the repackaged document at the client as it arrives until complete, and in parallel with the rendering step, schedules execution of the scripts by the client to validate corresponding data elements no sooner than the step of rendering. The method inputs user data for the document at the client as the step of rendering occurs.