.onefast{background: url(../images/arrow_c.png) 5px 16px no-repeat;}
li.treeone{background: url(../images/arrow_c.png) 15px 16px no-repeat;padding-left:25px;}
li.treetow{background: url(../images/arrow_c.png) 25px 16px no-repeat;padding-left:35px;}
li.treefour{background: url(../images/arrow_c.png) 35px 16px no-repeat;padding-left:45px;}
li.treefive{background: url(../images/arrow_c.png) 45px 16px no-repeat;padding-left:55px;}
li.six{background: url(../images/arrow_c.png) 55px 16px no-repeat;padding-left:65px;}

.treeview li.collapsable, .treeview li.expandable {background-image: none;padding:0px;}
.treeview .collapsable-hitarea {background: url(../images/arrow_b.png) 5px 16px no-repeat;}
.treeview .expandable-hitarea {background: url(../images/arrow_a.png) 5px 16px no-repeat;}
.treeview .-hitarea,.treeview .last-hitarea {background: url(../images/arrow_c.png) 5px 16px  no-repeat;}

.treeone .hitarea{margin-left: 10px;}
.treetow .hitarea{margin-left: 20px;}
.treefour .hitarea{margin-left: 30px;}
.treefive .hitarea{margin-left: 40px;}
.six .hitarea{margin-left: 50px;}