css fixes needed for dhtml popup menu

i need to have some css issues fixed in an existing page - see screenshots: * main menu items should be horizontally centered (currently left aligned) - the number and width of the items may vary from page to page, so no absolute positioning please * mouseover for main menu items should change the background color as shown in the original design jpg * background color of popup menu currently is slightly different from the color in the jpg - maybe this can be adjusted to look more alike? * on the popup menu there should be a 1px line left and right of the mouseover subitem (light background), but no line below it (see screenshot). the number of items in the popup menu will vary for each main menu item, ant there might be a level2 item at the bottom (as shown in the screenshot), but also a level3 item - depending on the page. i can give you a preview url on request and will also deliver html, js, css and image? files if needed. but i'd prefer if you'd just download that all from the preview url ... if you need more information, please just let me know. thanks a lot. martin.