WITTree style class has 13 sub classes, controlling the global appearance of the Simple Tree menu, but also its behavior : change with caution.

Example (this document styles : extract of style sheet. Do not change values shown in red) :

/* WIT wrapping of CSS Simple Tree Menu (courtesy of www.dynamicdrive.com)          */
.WITTree { 
font-family:arial, verdana;
font-size:115%;
font-weight:500;
padding:3px;
background-color:RGB(132, 142, 200);
margin:5px;
margin-top:5px;
}

/* Inner container of WIT Simple Tree Menu          */
.WITTreeInner { 
margin-left: -38px;
margin-top:0px;
margin-bottom:0px;
padding: 0px;
}

/* Links in WIT menu, active          */
a.WITTreeLink:active { 
/* Insert properties */
}

/* Links in WIT menu, visited          */
a.WITTreeLink:visited { 
color:white;
}

/* Links in WIT menu, hover */
a.WITTreeLink:hover { 
text-decoration:none;
color:RGB(255, 232, 211);
}

/* Links in WIT menu, link          */
a.WITTreeLink:link { 
color:white;
}

/* CSS for Simple Tree Menu : Main list          */
ul.treeview { 
margin-top:0px;
margin-bottom:0px;
}

/* CSS for Simple Tree Menu          */
.treeview ul { 
/*CSS for Simple Tree Menu*/
margin: 0px;
padding: 0px;
}

/* Style for LI elements in general (excludes an LI that contains sub lists)          */
.treeview li { 
/*Style for LI elements in general (excludes an LI that contains sub lists)*/
background: transparent  url(../extra/list.gif) no-repeat 0px 2px;
list-style-type: none;
padding-left: 15px;
margin-bottom: 3px;
}

/* Style for LI that contains sub lists (other ULs).          */
.treeview li.submenu { 
/* Style for LI that contains sub lists (other ULs). */
background: transparent  url(../extra/closed.gif) no-repeat -9px -6px;
cursor: hand !important;
cursor: pointer !important;
}

/* Style for ULs that are children of LIs (submenu)           */
.treeview li.submenu ul  { 
/*Style for ULs that are children of LIs (submenu) */
display: none; /*Hide them by default. Don't delete. */
}

/* Style for LIs of ULs that are children of LIs (submenu)           */
.treeview .submenu ul li { 
/*Style for LIs of ULs that are children of LIs (submenu) */
cursor: default;
}