This example implements horizontal group headings by assigning the headings to odd-numbered rows ( list1, list3 ) and the links to even-numbered rows ( list2, list4 ), then using oddstyle to set the background color. ...
Typically used to set background color ( background:#nnnnnn; ) in order to achieve an alternating background color between odd and even-numbered lists. evenodd [swap, even, odd, off]: If set to swap , then the automatic striping of even ...