#left_navigation {
margin: 5px 0 0 10px;
padding:0;
width:220px;
}
#left_navigation ul{
list-style-type:none;
width:220px;
margin: 0; padding: 0;
background: #f1f1f1;
font-size:13px;
text-transform:uppercase;
}

#left_navigation ul li{ 
 margin: 0;
 padding: 0;
 border-bottom:1px solid #DDD;
 position: relative;
 font-weight: bold;
}
#left_navigation ul ul{
position:absolute;
top:0;
left:220px;
background: #f1f1f1;
font-size:13px;
text-transform:uppercase;
display:none;
}
#left_navigation  li:hover {
 background:#19b3e8;
}

#left_navigation li.submenu {
 background:url('../images/arw.gif') 200px 15px no-repeat;
}
#left_navigation  li.submenu:hover {
 background:#19b3e8 url('../images/arw.gif') 200px 15px no-repeat;
}
#left_navigation  ul li a{
 display:block;
 text-align: left;
 color: #333;
 text-decoration: none;
 border-right: 1px solid #FFF;
 height:35px;
 line-height:35px;
 text-indent:15px;
 border-left: 10px solid #999;
}

#left_navigation  ul.menu_level1 li.submenu:hover ul.menu_level2 {display:block;}
#left_navigation  ul.menu_level2 li.submenu:hover ul.menu_level3 {display:block;}
#left_navigation  ul.menu_level3 li.submenu:hover ul.menu_level4 {display:block;}