.level1 td:first-child {
    padding-left: 15px;
}
.level2 td:first-child {
    padding-left: 30px;
}

.collapse .toggle {
    background: url("../images/collapse.gif") no-repeat 0 50%;
    background-position: top left;
}

.expand .toggle {
    background: url("../images/expand.gif");
    background-position: top left;
}

.toggle {
    height: 9px;
    width: 9px;
    display: inline-block;   
}