1. A computerized method of mapping one or more dynamic visual objects of a network document, comprising: monitoring a plurality of web messages transmitted during at least one of loading and modifying a network document having a plurality of dynamic visual objects by a browser of a client terminal; providing a dynamic model having a plurality of model elements each indicative of another of said plurality of dynamic visual objects; monitoring changes to said dynamic model to identify a first of said plurality of web messages has an effect on a first of said plurality of dynamic visual objects; and automatically mapping, using a processor, between said first dynamic visual object and said first web message according to a source of said first web message.