Because different browsers may render HTML and CSS differently, the best way to ensure styles show up correctly in all browsers is to test your website using different browsers.
Please contact the appropriate software vendor or IT professional for assistance with this process or issue, which is beyond Blackbaud's scope of support.

The following links point to helpful tutorials about CSS for menus.  Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist with implementing resolutions from these websites.
http://www.cssplay.co.uk/menus/
http://css.maxdesign.com.au/listutorial/
http://www.dynamicdrive.com/
http://www.digitalfamily.com/dreamweaver/resources/web-browser-test.html

http://spoon.net/browsers/