.left {  background-image:   url(running/running-l.gif); background-repeat: repeat-y}
.right { background-image:   url(running/running-r.gif); background-repeat: repeat-y }
.oben {  background-image:  url(running/running-o.gif); background-repeat: repeat-x}
.unten { background-image:  url(running/running-u.gif); background-repeat: repeat-x }