#nav {padding:0; margin:0; list-style:none; height:43px; position:relative; z-index:200; font-family:arial, verdana, sans-serif; width:608px;}
#nav li.top {display:block; float:left;}
#nav li a {display:block; float:left; height:43px;  text-decoration:none; padding:0; cursor:pointer;}
#nav .sub li a {display:block; float:left; height:18px;  text-decoration:none; padding:0; cursor:pointer;}
#nav li a b {margin-left:-9999px;}

#nav li a.menubar01 {background:url(menus/menubar_01.png); width: 81px;}
#nav li a.menubar02 {background:url(menus/menubar_02.png); width: 91px;}
#nav li a.menubar03 {background:url(menus/menubar_03.png); width: 107px;}
#nav li a.menubar04 {background:url(menus/menubar_04.png); width: 85px;}
#nav li a.menubar05 {background:url(menus/menubar_05.png); width: 73px;}
#nav li a.menubar06 {background:url(menus/menubar_06.png); width: 150px;}

#nav li:hover a,
#nav a:hover
{background-position: 0 43px;}

#nav .sub li:hover a,
#nav .sub a:hover
{background-position: 0 18px;}

#nav table {position:absolute; top:0; left:0; border-collapse:collapse; padding:0; width:100px; height:100px; margin:-1px;
}

#nav .sub {position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover {position:relative; z-index:200;}
#nav a:hover {position:relative; white-space:normal; z-index:200;}

#nav :hover ul.sub {left:0; top:43px;  width:169px; height:auto; z-index:300;}
#nav :hover ul.sub li {display:block; height:18px; position:relative; float:left; width:169px;}
#nav :hover ul.sub li a {display:block; height:18px; width:169px;  text-decoration:none; padding:0; cursor:pointer;}
#nav :hover ul.sub li a b {position:absolute; left:-9999px; margin:0;}

#nav :hover ul li a.company01 {background:url(menus/submenus/company_01.png);}
#nav :hover ul li a.company02 {background:url(menus/submenus/company_02.png);}
#nav :hover ul li a.company03 {background:url(menus/submenus/company_03.png);}
#nav :hover ul li a.company04 {background:url(menus/submenus/company_04.png);}
#nav :hover ul li a.company05 {background:url(menus/submenus/company_05.png);}
#nav :hover ul li a.company06 {background:url(menus/submenus/company_06.png);}
#nav :hover ul li a.company07 {background:url(menus/submenus/company_07.png);}
#nav :hover ul li a.company08 {background:url(menus/submenus/company_08.png);}

#nav :hover ul li a.pricequote01 {background:url(menus/submenus/pricequote_01.png);}
#nav :hover ul li a.pricequote02 {background:url(menus/submenus/pricequote_02.png);}

#nav :hover ul li a.services01 {background:url(menus/submenus/services_01.png);}
#nav :hover ul li a.services02 {background:url(menus/submenus/services_02.png);}
#nav :hover ul li a.services03 {background:url(menus/submenus/services_03.png);}
#nav :hover ul li a.services04 {background:url(menus/submenus/services_04.png);}

#nav :hover ul li a.aircraft01 {background:url(menus/submenus/aircraft_01.png);}
#nav :hover ul li a.aircraft02 {background:url(menus/submenus/aircraft_02.png);}
#nav :hover ul li a.aircraft03 {background:url(menus/submenus/aircraft_03.png);}

#nav :hover ul li a.qualifications01 {background:url(menus/submenus/qualifications_01.png);}
#nav :hover ul li a.qualifications02 {background:url(menus/submenus/qualifications_02.png);}
#nav :hover ul li a.qualifications03 {background:url(menus/submenus/qualifications_03.png);}
#nav :hover ul li a.qualifications04 {background:url(menus/submenus/qualifications_04.png);}

#nav :hover .sub .bottom {height: 23px;}
#nav :hover .sub .double {height: 36px;}
#nav :hover .sub .doublebottom {height: 41px;}

#nav :hover ul.sub li a:hover {background-position: 0 18px; position:relative;}

#nav :hover .sub a:hover.bottom {height: 23px; background-position: 0 23px; position:relative;}
#nav :hover .sub a:hover.double {height: 36px; background-position: 0 36px; position:relative;}
#nav :hover .sub a:hover.doublebottom {height: 41px; background-position: 0 41px; position:relative;}