Determining interactions between scripts and elements of a markup language document includes loading a markup language document into a browser. The markup language document includes a plurality of markup language elements. A call from within the markup language document to a method specified by a script is detected. The markup language element of the plurality of markup language elements that is modified by execution of the method is determined using the processor. Log data is stored that includes a name of the modified markup language element in association with a name of the method.