margin left and right on width 100%

Question

I have a div that\'s set to width 100%. I wanted to set a margin right and left of 20px. For some reason only the left is being pushed over 20px. It ignores the right. Is th

Answer 1

Not stupid at all. What's happening is you are trying to set a banner somewhat like this: (# is the margin)

==========
#--------#
==========

but it ends up like this:

==========
#----------#
==========

making it look like this:

==========
#---------
==========

adding a margin does not reduce the set width of 100%.

you might try using left:20px; right:20px; and leave the width and margin auto

EDIT
or just leaving width off like the others have suggested. :P