div.menu_main {
}

div.menu_main ul

div.menu_sub {
}

div.menu_inner_main {
}

div.menu_inner_sub {
}


/*
vert:
a.nav, a.nav:link, a.nav:visited {display:block; width:150px; height:25px;
background:#dca; border:1px solid #000; margin-top:2px; text-align:center;
text-decoration:none; font-family:verdana, arial, sans-serif; font-size:12px; color:#000; line-height:25px; overflow:hidden;}
horz:
add float:left; to the a.nav, a.nav:link, a.nav:visited. (with a right-margin if you want separation).
*/