#nav, #nav ul{
margin:2px;
padding:0;
list-style-type:none;
list-style-position:outside;
position:relative;
line-height:1.5em; 
text-align:left;
}

#nav a{
display:block;
padding:0px 12px 0px 15px;
color:#FFF;
text-decoration:none;
font-size:1.2em;
}

#nav a:hover{

color:#FFF;
text-decoration: underline;
padding:0px 12px 0px 10px;
border-left:5px solid #FFF;
}

#nav li{
float:left;
position:relative;
}


#nav ul {
position:absolute;
display:none;
width:9em;
top:1.5em;
z-index:10;
}

#nav li ul a{
width:9em;
height:auto;
float:left;
}

#nav ul ul{
top:auto;
}	

#nav li ul  {
margin:0px 0 0 0px;
background:transparent url(http://netsubsys3.free.fr/fond_menu.png);
z-index:2000;
}

#nav li ul ul {
left:5em;
top:0;
margin:0px 0 0 10px;
background:transparent url(http://netsubsys3.free.fr/fond_menu.png);
z-index:2000;
}

#nav li:hover ul ul, #nav li:hover ul ul ul, #nav li:hover ul ul ul ul{
display:none;
}
#nav li:hover ul, #nav li li:hover ul, #nav li li li:hover ul, #nav li li li li:hover ul{
display:block;
}