Adds translucent bars to the top and bottom of the viewport, which indicates the previous viewport position when the page is scrolled. This tool will prevents you from getting lost when you press the Page Up/Down keys.
当前为
This is a script I salvaged off the old http://userscripts.org/users/mstm account. I could not find the original owner; if this is your code, let me know.
Seems to work OK.
Seems to work OK.
