If you hold down the right mouse button and move the mouse up, it will move to the top of the page. If you move the mouse down, it will move to the bottom of the page. If you move the mouse to the left, it will go "back." If you move the mouse to the right, it will go "forward." A line is displayed to give you a sense of perspective. This is a very simple script, so it runs smoothly and you can use the context menu as is.
