"

From 2013.igem.org

*{ margin:0px; padding: 0px; } #nav { font-family: arial, sans-serif; position: relative; width: 390px; height:56px; font-size:14px; color:#999; margin: 0px auto; } #nav ul { list-style-type: none; } #nav ul li { float: left; position: relative; } #nav ul li a { text-align: center; border-right:1px solid #e9e9e9; padding:20px; display:block; text-decoration:none; color:#999; } #nav ul li ul { display: none } #nav ul li:hover ul { display: block; position: absolute; } #nav ul li:hover ul li a { display:block; background:#12aeef; color:#ffffff; width: 110px; text-align: center; border-bottom: 1px solid #f2f2f2; border-right: none; } #nav ul li:hover ul li a:hover { background:#6dc7ec; color:#fff; }