body {margin:0px;}
* {padding:0; margin:0;}
.dropdown {font:11px Arial; color:#ffffff;float:left; padding-right:1px;padding-left:4px;}
.dropdown dt {width:175px; border:0px solid #9ac1c9; padding:6px; font-weight:bold; cursor:pointer; background:url(images/boton.jpg); background-repeat:no-repeat; }
.dropdown dt:hover {background:url(images/header_over.gif);}
.dropdown dd {position:absolute; overflow:hidden; width:182px; display:none; background:#fff; opacity:0;}
.dropdown ul {width:182px; border:1px solid #b2b9fd; list-style:none; border-top:none;}
.dropdown li {display:inline;}
.dropdown a, .dropdown a:active, .dropdown a:visited {display:block; padding:3px; color:#333; text-decoration:none; background:#d8e9fc;width:182px;}
.dropdown a:hover {background:#d8e9fc; color:#006699;}
.dropdown .underline {border-bottom:1px solid #b2b9fd;}