1. In a computer system having a system clipboard, a method for performing a store operation in response to a store request from a user engaged in editing a markup language document having one or more textboxes, the method comprising the steps of: if any text within a textbox is selected, passing the store request to the system clipboard; if a textbox is selected and no text within the textbox is selected, storing the text content and associated text attributes of the selected textbox in a first local clipboard, passing the store request to the system clipboard, requesting the text of the selected textbox from the system clipboard, and storing the text received from the system clipboard in a second local clipboard.