Superfish - nav-bar style - "Current" menu not highlighted

Superfish - nav-bar style - "Current" menu not highlighted

Hi all,

I'm facing a problem using superfish nav-bar jquery plugin. The "current" menu of the nav-bar style is higlighted in darker color only if I use doctype declaration <!DOCTYPE html>. If I use declaration <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> instead (which is necassary for my SAP Business Server page to work) the menu is not higlighted any more. Any ideas how to resolve this?

Thanks and best regards, Oliver