#head_menu {float:left;width:600px;height:20px;margin:0px;padding:0px;background:teal;}
#menu {display:inline;}
#menu li {float:left;position:relative;list-style:none;_width:1px;z-index:100;}
#menu a.menu_head {display:block; height:16px;margin:2px 0px;padding:0px 10px; font-size:12px; color:white;text-align:center;text-decoration:none; white-space:nowrap;}
#menu li ul {display:none;position:absolute;top:20px; left:0px; width:175px;padding:0px; margin:0px; background:#dcdcdc;}
#menu li ul li {width:173px; height:20px; margin:0px; padding:0px; border:1px solid teal; border-top:none;}
#menu li ul li a { width:171px; _width:175px; height:18px; text-decoration:none;  color:black; font-size:11px; margin:0px; padding-left:5px; padding-top:3px; display:block;}
#menu li ul li a:hover {background:white;width:168px;_width:175px;height:16px;_height:18px;}
#menu li > ul {top: auto;left: auto;}
#menu li:hover ul, #menu li.over ul{display: block;}