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CSS
 /*Código obtenido de www.aizumblog.com */
 #menu{
 width: 100%;
 margin: 0;
 padding: 10px 0 0 0;
 list-style: none;
 background: #F7E4F6;
 background: -moz-linear-gradient(#E19FDF, #F7E4F6);
 background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #111),color-stop(1, #444));
 background: -webkit-linear-gradient(#E19FDF, #F7E4F6);
 background: -o-linear-gradient(#E19FDF, #F7E4F6);
 background: -ms-linear-gradient(#E19FDF, #F7E4F6);
 background: linear-gradient(#E19FDF, #F7E4F6);
 -moz-border-radius: 3em 2.5em/1em 2.5em;
 border-radius: 3em 2.5em/1em 2.5em;
 -moz-box-shadow: 0 2px 1px #9c9c9c;
 -webkit-box-shadow: 0 2px 1px #9c9c9c;
 box-shadow: 0 2px 1px #9c9c9c;
 }

 #menu li{
 float: left;
 padding: 0 0 10px 0;
 position:relative; 
 }

 #menu a{
 float: left;
 height: 25px;
 padding: 2 25px;
 color: #000;
 text-transform: uppercase;
 font: bold 12px/25px Arial, Helvetica;
 text-decoration: none;
 text-shadow: 0 1px 0 #000;
 }

 #menu li:hover > a{
 color: #fafafa;
 }

 *html #menu li a:hover{ /* IE6 */
 color: #fafafa;
 }

 #menu li:hover > ul{
 display: block;
 }

 /* Sub-menu */

 #menu ul{
 list-style: none;
 margin: 0;
 padding: 0;
 display: none;
 position: absolute;
 top: 35px;
 left: 0;
 z-index: 99999;
 background: #F7E3F6;
 background: -moz-linear-gradient(#C9BAC9, #B19EE0);
 background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #B19EE0),color-stop(1, #C9BAC9));
 background: -webkit-linear-gradient(#C9BAC9, #B19EE0);
 background: -o-linear-gradient(#C9BAC9, #B19EE0);
 background: -ms-linear-gradient(#C9BAC9, #B19EE0);
 background: linear-gradient(#C9BAC9, #B19EE0);
 -moz-border-radius: 3em 2.5em/1em 2.5em;
 border-radius: 3em 2.5em/1em 2.5em;
 }
 
 #menu ul li{
 float: none;
 margin: 0;
 padding: 0;
 display: block;
 -moz-box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
 -webkit-box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
 box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
 }

 #menu ul li:last-child{
 -moz-box-shadow: none;
 -webkit-box-shadow: none;
 box-shadow: none;
 }

 #menu ul a{
 padding: 10px;
 height: auto;
 line-height: 1;
 display: block;
 white-space: nowrap;
 float: none;
 text-transform: none;
 }

 *html #menu ul a{ /* IE6 */
 height: 10px;
 width: 150px;
 }

 *:first-child+html #menu ul a{ /* IE7 */
 height: 10px;
 width: 250px;
 }

 #menu ul a:hover{
 background: #B096AF;
 background: -moz-linear-gradient(#04acec, #0186ba);
 background: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
 background: -webkit-linear-gradient(#04acec, #0186ba);
 background: -o-linear-gradient(#04acec, #0186ba);
 background: -ms-linear-gradient(#04acec, #0186ba);
 background: linear-gradient(#04acec, #0186ba);
 } 

 #menu ul li:first-child a{
 -moz-border-radius: 3em 2.5em/1em 2.5em;
 -webkit-border-radius: 3em 2.5em/1em 2.5em;
 border-radius: 3em 2.5em/1em 2.5em;
 }

 #menu ul li:first-child a:after{
 content: '';
 position: absolute;
 left: 30px;
 top: -8px;
 width: 0;
 height: 0;
 border-left: 5px solid transparent;
 border-right: 5px solid transparent;
 border-bottom: 8px solid #4A3B49;
 }
 
 #menu ul li:first-child a:hover:after{
 border-bottom-color: #4A3B49;
 }
 
 #menu ul li:last-child a{
 -moz-border-radius: 3em 2.5em/1em 2.5em;
 -webkit-border-radius: 3em 2.5em/1em 2.5em;
 border-radius: 3em 2.5em/1em 2.5em;
 }

 /* Clear floated elements */
 #menu:after{
 visibility: hidden;
 display: block;
 font-size: 0;
 content: " ";
 clear: both;
 height: 0;
 }

 * html #menu { zoom: 1; } /* IE6 */
 *:first-child+html #menu { zoom: 1; } /* IE7 */