body {margin:25px; font:12px Verdana, Arial, Helvetica}
* {padding:0; margin:0}

.dropdown {float:left; padding-right:5px}
.dropdown dt {width:78px; border:0px solid #228b22; padding:5px; font-weight:bold; color:#ffffff;  cursor:pointer; }
.dropdown dt:hover {background:#90ee90  ;}
.dropdown dd {position:absolute; overflow:hidden; width:208px; display:none; background:#fff; z-index:200; opacity:0}
.dropdown ul {width:204px; border:1px solid #228b22; list-style:none; border-top:none}
.dropdown li {display:inline}
.dropdown a, .dropdown a:active, .dropdown a:visited {display:block; padding:5px; color:#ffffff; text-decoration:none; background:url(../imagens/barra_menu.jpg) ; width:194px}
.dropdown a:hover {background:#90ee90 }
.dropdown .underline {border-bottom:1px solid #ccffff}