On CodeProject.com we use CSS
However, for mobile devices and pads that use a touchscreen there is no mouse over or hover event so this design fails.
1. Simply not show menus and just have links that go to pages that have the options that would have appeared in the menu dropdown?
2. Use the :active pseudo-class and work out how to make the link reference a bookmark on the page instead of an off-page link?
3. Use a SELECT control with OPTIONs for each item in the menu. Some mobile devices have excellent support for these.
4. Liquid Nitrogen?