I am changing over to Webstyle navbars and have implemented the if(SAF) option for Google Chrome as suggested. The menus almost work. When you move the mouse over a menu the menu jumps; it first appears above the navbar then, as the mouse pointer moves into the menu option the drop down settles back into position.
If you move the mouse pointer slowly onto the menu from below and stop at the bottom of the menu option the drop down appears, dislocated above the navbar.
IE does not have this problem, the navbar works fine.
The effect can be viewed using Google Chrome here
Thanks
Bookmarks