Menu DROPDOWN com CSS e HTML.

Este é uma boa dica, pois este menu não usa JAVASCRIPT, é compatível com inúmeros navegadores inclusive o IE 6.0, segue o code HTML:

<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 agora o código em 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;
}

O resultado irá ser mais ou menos este aqui:

Para pegar este arquivo, clique aqui.

Abraços até a próxima.