I am using a combination of html, css pages and JavaScript to provide my visitors with drop-down menus. The menus are designed to appear directly under the top-level "pseudo-buttons" when those buttons receive an "onmouseover" event. Whilst IE, Avant and Chrome browsers display these menus correctly - ie in the designed position - Firefox displaces them approximately 50% of their width to the right. There are no other problems. I would like to have my websites working correctly in ALL web browsers, including Firefox. Any suggestions as to how I can edit my code to correct this issue will be gratefully received.