.tree-lines-c {background: transparent url("lines-c.gif") no-repeat 1px 50%;}
.tree-lines-b {background: transparent url("lines-b.gif") no-repeat 1px 50%;}
.tree-lines-t {background: transparent url("lines-t.gif") no-repeat 1px 50%;}
.tree-lines-s {background: transparent url("lines-s.gif") no-repeat 1px 50%;}
.tree-lined {background: transparent url("lines-v.gif") repeat-y 1px 0;}
.tree-lines-dot {background: transparent url("dot.gif") no-repeat 1px 50%;}