The navigation above uses absolutely positioned <dt> and <dd> elements in a descriptive list (<dl>). You don't have to use a list, any container will do, but a list has more meaning in textual browsers etc.
The pull-down menus use CSS and Javascript, there is an adjustable delay before the pull-down closes on mouseout.
The javascript used has not been adjusted to work in Netscape4.X but if your CSS is in an imported (@import) file old Netscape users will only see the HTML list anyway, so it won't matter.
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