Forum:I need some javascript help!

By using javascript, how can I make the bottom-right corner of the mainpagehover identical to wherever your mouse is (as long as it is on the mainpagebutton)? Wiki is Isle of Tune Wiki &mdash; [/wiki/User:Sam_Wang S a m ] [/wiki/User_talk:Sam_Wang W a n g ] 10:31, March 17, 2012 (UTC)