body {
    margin: 0;
    padding:0;
    font-family: arial, helvetica, sans-serif;
    }


/*The copyright.*/
div, td{
    font-size:10pt;
}

div.copyright{
    font-size:8pt;
    padding-top:1em;
}
#nav_tree div.copyright{
    padding-top:0.2em;
    padding-left:1em;
}

/* Makes the titles stand-out */
h1.title,
h2.title{
    color:black;
    background-color:silver;
    padding: 0.2em;
}


/* The navigation tree classes */
#nav_tree > ul{
    border-top:1px solid gray;
    border-bottom:1px solid gray;
    margin-top: 0em;
    margin-left: 0.2em;
    margin-right: 0.5em;
    min-width:400px;
    padding: 1em;
    font-size:10pt;
    text-align:left;
}

#content{
    margin-left:1em;
    border-left:2px solid gray;
    padding-left:1em;
}

#nav_tree ul ul{
    margin:0;
    padding:0;
}

#nav_tree form{
    margin-top:0.5em;
    margin-bottom:0.5em;
    padding-right:0.5em;
    /*text-align:right;*/
}
#nav_tree form input{
    font-size:8pt;
}

#nav_tree li {
    margin-top: 0.2em;
    margin-left: 1em;
    list-style-type:none;
}

/* The links */
#nav_tree a.nav_tree{
    color:black;
    background-color:inherit;
}

/* The selected page. */
#nav_tree li.nav_tree_last_open_book > a{
    background-color: #333399;
    color:white;
    text-decoration:none;
}

#nav_tree li:before{
    display:inline;
    vertical-align:text-bottom;
    padding-top:0.2em;
    padding-right:0.2em;
}


/* Icons before the links.*/
#nav_tree li.nav_tree_open_book,
#nav_tree li.nav_tree_last_open_book{
/*    display:inline;
    content:url('img/open_book.gif');*/
    background-image:url('img/open_book.gif');
    background-repeat:no-repeat;
    text-indent:20px;
    
}

#nav_tree li.nav_tree_book{
    background-image:url("img/book.gif");
    background-repeat:no-repeat;
    text-indent:20px;
    /*content:url("img/book.gif");*/
}

#nav_tree li.nav_tree_page{
/*    display:inline;
    content:url('img/page.gif');*/
    background-image:url('img/page.gif');
    background-repeat:no-repeat;
    text-indent:20px;
    
}

/* Title displayed over the tree area.*/
#nav_tree p.nav_title { 
    font-size: 14pt; 
    font-weight: bold; 
    margin-bottom: 0.5px; 
    margin-top: 0.5em;
    margin-left: 0.5em;
    margin-right: 0.5em;
}
#nav_tree p.nav_title a{ 
    text-decoration:none;
    color:black;
    background-color:inherit;
}

/* The path in the document displayed over the content.*/
div.nav_path{
    text-align:right;
}