Debes agregar el nuevo estilo asï
Código:
<style type="text/css">
<!–
#demo-container{
padding:25px 15px 0 15px;
margin:0 0 15px 0;
background:#67A897;
}
ul#simple-menu{list-style-type:none;width:630px;position:relative;height:27px;font-family:"Trebuchet MS",Arial,sans-serif;font-size:13px;font-weight:bold;margin:0;padding:11px 0 0 0;border-bottom:1px solid #000000}
ul#simple-menu li{display:block;float:left;margin:0 0 0 4px;height:27px;margin-left:0px; margin-right:3px;}
ul#simple-menu li.left{margin:0;}
ul#simple-menu li a{display:block;float:left;color:#fff;background:#4A6867;line-height:27px;text-decoration:none;padding:0 17px 0 18px;height:27px;}
ul#simple-menu li a.right{padding-right:19px;}
ul#simple-menu li a:hover{background:#2E4560;}
ul#simple-menu li a.current{color:#2E4560;background:#fff;border:1px solid #000000; border-bottom:none;}
ul#simple-menu li a.current:hover{color:#2E4560;background:#fff;}
.abajo{
width: 628px;
height: 100px;
border:1px solid #000000;
border-top: none;
}
#last { margin: 0;}
–>
</style>
Saludos