CSS Dropdown menu sem JavaScript ou hacks

Aqueles que como eu que trabalham com desenvolvimento web sabem o quanto é complicado desenvolver um menu dropdown que além de funcionar em todos os browsers ainda funcione através do teclado, tudo isso sem a utilização de JavaScript ou Hacks CSS.

Mas Michael MacNaughton conseguiu desenvolver um menu desse tipo, que funciona em todos os browsers, inclusive no Internet Explorer 6. O código HTML pode ser visto abaixo:

<div class="wrapper">

    <div class="mainmenu">
        <ul class="menu">
        <li class="list"><a class="category" href="#Home">Home</a></li>
        </ul>
        <ul class="menu">
            <li class="list">
                <a class="category" href="#about">About Us&nbsp;&nbsp;&raquo;</a>
                <ul class="submenu">
                    <li><a href="#about1">About link 1</a></li>
                    <li><a href="#about2">About link 2</a></li>
                    <li><a href="#about3">About link 3</a></li>
                    <li><a href="#about4">About link 4</a></li>
                    <li><a class="endlist" href="#about5">About link 5</a></li>
                </ul>
            </li>
        </ul>
        <ul class="menu">
            <li class="list">
                <a class="category" href="#articles">Articles&nbsp;&nbsp;&raquo;</a>
                <ul class="submenu">
                    <li><a href="#articles1">Articles link 1</a></li>
                    <li><a href="#articles2">Articles link 2</a></li>
                    <li><a href="#articles3">Articles link 3</a></li>
                    <li><a class="endlist" href="#articles4">Articles link 4</a></li>
                </ul>
            </li>
        </ul>
        <ul class="menu">
            <li class="list">
                <a class="category" href="#news">News&nbsp;&nbsp;&raquo;</a>
                <ul class="submenu">
                    <li><a href="#news1">News link 1</a></li>
                    <li><a href="#news2">News link 2</a></li>
                    <li><a class="endlist" href="#news3">News link 3</a></li>
                </ul>
            </li>
        </ul>
        <ul class="menu">
            <li class="list"><a class="category" href="#donate">Donate</a></li>
        </ul>
        <ul class="menu">
            <li class="list"><a class="category" href="#contact">Contact</a></li>
        </ul>
    </div>
</div>

E após, aplicamos o seguinte CSS:

body {
	font-family: Verdana, Geneva, sans-serif;
	font-size: 100%;
	color: #666;
	background-color: #fff;
	margin-left: 20px;
	margin-top: 20px;
	margin-right: 20px;
	margin-bottom: 20px;
}

a, a:hover, a:active, a:focus {
	outline:0;
	direction:ltr;
}

.wrapper {
	position:relative; height:25px;
}

.mainmenu {
	position:absolute;
	z-index:100;
	font-family:Verdana, Geneva, sans-serif;
	font-weight:normal;
	font-size:90%;
	line-height:25px;
	left:50%;
	margin-left:-303px;
	width:606px;
}

ul.menu {
	padding:0;
	margin:0;
	list-style:none;
	width:100px;
	overflow:hidden;
	float:left;
	margin-right:1px;
}

ul.menu a {
	background:#369;
	text-decoration:none;
	color:#fff;
	padding-left:5px;
}

ul.menu li.list {
	float:left;
	width:250px;
	margin:-32767px -125px 0px 0px;
	background:url(images/top1.png) no-repeat left bottom;
}

ul.menu li.list a.category {
	position:relative;
	z-index:50;
	display:block;
	float:left;
	width:120px;
	margin-top:32767px;
	background:transparent;
}

ul.menu li.list a.category:hover,
ul.menu li.list a.category:focus,
ul.menu li.list a.category:active {
	margin-right:1px;
	background-image:url(images/tophover1.png);
	background-repeat:no-repeat;
	background-position:left top;

}

ul.submenu {
	float:left;
	padding:25px 0px 0px 0px;
	margin:0;
	list-style:none;
	background-image:url(images/tophover1.png);
	background-repeat:no-repeat;
	background-position:left top;
	margin:-25px 0px 0px 0px;
}

ul.submenu li a {
	float:left;
	width:120px;
	background:#369;
	clear:left;
	color:#fff;
}

ul.submenu li a.endlist {
	background:url(images/bottom1.png);
}

ul.submenu li a.endlist:hover,
ul.submenu li a.endlist:focus,
ul.submenu li a.endlist:active {
	background:url(images/bottomhover1.png);
}

ul.submenu a:hover,
ul.submenu a:focus,
ul.submenu a:active {
	background:#900;
	margin-right:1px;
	color:#fff;
}

Vocês podem ver aqui um exemplo do menu em funcionamento, ou se preferir, pode fazer o download do menu para estudo.

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