1. A processor based method for graphical object selection in a web browser-based application, the method comprising: storing a selection overlay in a web document, wherein the selection overlay encompasses a plurality of user-selectable graphical objects in the web document, is not visually apparent when displayed relative to the encompassed plurality of graphical objects, and occupies a highest position in layers of graphical objects in the web document, wherein the selection overlay includes a plurality of selection regions, and each selection region is respectively associated with one of the plurality of graphical objects and defines a region of selectability for the associated graphical object; determining each of the selection regions based on transparency levels of image data of the associated graphical object; displaying the plurality of graphical objects and selection overlay by the web browser-based application; in response to the web browser-based application detecting entry of a user-directed pointer into one of the selection regions in the selection overlay, selecting the graphical object associated with the one selection region for user manipulation; and displaying the graphical object associated with the one selection region in response to and as a result of user manipulation of the selected graphical object.