Menu Control-expanding child items cause browser scroll bars to ap

[jojobar]

We are using the ASP:Menu control (horizontal) for site navigation. The menu
is contained by a table with css styles that allows us to give the illusion
of a menu bar that runs the entire width of the page. This table also has
additional right aligned cells on the same row for such things as logging out.

When the child menu items are displayed by the mouse hovering over a menu
item, the width of the web page is apparently increasing, because the
resulting displayed child menu items results in both the horizontal and
vertical scroll bars of the browser to appear. Setting the width of the table
cell that contains the menu control to some appropriate width does not
prevent this from happening.

The above affect results in the scroll bars coming and going as the menu
items are shown and hidden - clearly not a pleasing UI experience.

Has anyone run into this before??

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-jojobar