.t {background: url(../images/dot.gif) 0 0 repeat-x;}
.b {background: url(../images/dot.gif) 0 100% repeat-x}
.l {background: url(../images/dot.gif) 0 0 repeat-y}
.r {background: url(../images/dot.gif) 100% 0 repeat-y}
.bl {background: url(../images/bl.gif) 0 100% no-repeat}
.br {background: url(../images/br.gif) 100% 100% no-repeat}
.tl {background: url(../images/tl.gif) 0 0 no-repeat}
.tr {background: url(../images/tr.gif) 100% 0 no-repeat;}
.tr {padding: 5px 10px;} /* the same padding as #header .level1 li (not selected)*/