I did a quick search to see if this had already been posted, but I couldn’t find anything. For some reason I have a feeling this will have been posted, since it seems like a common thing to me… but ah well, if it has, lock this. 
http://s94009834.onlinehome.us/xyz/move.html
EDIT: It’s best to have your browser window not maximised in the middle of your screen to start with.