Why do I see gray margins on the top right and left corner?

[Criticlicious]

it looks like a box cut in half diagonally. it's placed on the top right and
left corners. how do I get rid of them? thanks.

this is the direct link of what it looks like...
http://img261.imageshack.us/img261/694/untitled1copyhq9.jpg

 

[Suzanne S. Barnhill]

See “Margin marks or crop marks appear on each corner of the page when you
open a document in Word 2002 or in Word 2003â€
http://support.microsoft.com/?kbid=839371