Abstract: A method and system for preservation of browser window integrity is disclosed. The position and size of script-created windows is adjusted as necessary to preserve critical data on the computer screen prior to rendering those windows. Popup windows are similarly adjusted so that window integrity is preserved. Popup window size is adjusted to be smaller than the vertical size of the popup's parent window. Popup window position is modified so that popups do not extend above the top, or below the bottom, of their parent window. Finally, the popup position in the z dimension is adjusted so that the popup appears immediately above its parent window.