超好DIV+CSS做導航下拉菜單
編輯：CSS詳解
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xHtml1-transitional.dtd">
<html XMLns="http://www.w3.org/1999/xHtml">
<head>
<meta http-equiv="Content-Type" content="text/Html; charset=gb2312" />
<title>三級dropdown彈出菜單 - JAVA:http://www.Javaweb.cc/</title>
<style type="text/CSS">
/* common styling */
.menu {font-family: arial, sans-serif; width:750px; position:relative; margin:0; font-size:11px; margin:50px 0;}
.menu ul li a, .menu ul li a:visited {display:block; text-decoration:none; color:#000;width:104px; height:20px; text-align:center; color:#fff; border:1px solid #fff; background:#710069; line-height:20px; font-size:11px; overflow:hidden;}
.menu ul {padding:0; margin:0;list-style-type: none; }
.menu ul li {float:left; margin-right:1px; position:relative;}
.menu ul li ul {display: none;}
/* specific to non IE browsers */
.menu ul li:hover a {color:#fff; background:#36f;}
.menu ul li:hover ul {display:block; position:absolute; top:21px; left:0; width:105px;}
.menu ul li:hover ul li a.hide {background:#6a3; color:#fff;}
.menu ul li:hover ul li:hover a.hide {background:#6fc; color:#000;}
.menu ul li:hover ul li ul {display: none;}
.menu ul li:hover ul li a {display:block; background:#ddd; color:#000;}
.menu ul li:hover ul li a:hover {background:#6fc; color:#000;}
.menu ul li:hover ul li:hover ul {display:block; position:absolute; left:105px; top:0;}
.menu ul li:hover ul li:hover ul.left {left:-105px;}
</style>
<!--[if lte IE 6]>
<style type="text/CSS">
.menu ul li a.hide, .menu ul li a:visited.hide {display:none;}
.menu ul li a:hover ul li a.hide {display:none;}
.menu ul li a:hover {color:#fff; background:#36f;}
.menu ul li a:hover ul {display:block; position:absolute; top:21px; left:0; width:105px;}
.menu ul li a:hover ul li a.sub {background:#6a3; color:#fff;}
.menu ul li a:hover ul li a {display:block; background:#ddd; color:#000;}
.menu ul li a:hover ul li a ul {visibility:hidden;}
.menu ul li a:hover ul li a:hover {background:#6fc; color:#000;}
.menu ul li a:hover ul li a:hover ul {visibility:visible; position:absolute; left:105px; top:0; color:#000;}
.menu ul li a:hover ul li a:hover ul.left {left:-105px;}
</style>
<![endif]-->
</head>
<body>
<div class="menu">
<ul>
<li><a class="hide" href="../menu/index.Html">DEMOS</a>
<!--[if lte IE 6]>
<a href="../menu/index.Html">DEMOS
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../menu/zero_dollars.Html" title="The zero dollar ads page">zero dollars</a></li>
<li><a href="../menu/embed.Html" title="Wrapping text around images">wrapping text</a></li>
<li><a href="../menu/form.Html" title="Styling forms">styled form</a></li>
<li><a href="../menu/nodots.Html" title="Removing active/focus borders">active focus</a></li>
<li><a class="hide" href="../menu/hover_click.Html" title="Hover/click with no active/focus borders">HOVER/CLICK ></a>
<!--[if lte IE 6]>
<a class="sub" href="../menu/hover_click.Html" title="Hover/click with no active/focus borders">HOVER/CLICK >
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../menu/form.Html" title="Styling forms">styled form</a></li>
<li><a href="../menu/nodots.Html" title="Removing active/focus borders">active focus</a></li>
<li><a href="../menu/hover_click.Html" title="Hover/click with no active/focus borders">hover/click</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a href="../menu/shadow_boxing.Html" title="Multi-position drop shadow">shadow boxing</a></li>
<li><a href="../menu/old_master.Html" title="Image Map for detailed information">image map</a></li>
<li><a href="../menu/bodIEs.Html" title="fun with background images">fun backgrounds</a></li>
<li><a href="../menu/fade_scroll.Html" title="fade-out scrolling">fade scrolling</a></li>
<li><a href="../menu/em_images.Html" title="em size images compared">em sized images</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="index.Html">MENUS</a>
<!--[if lte IE 6]>
<a href="index.Html">MENUS
<table><tr><td>
<![endif]-->
<ul>
<li><a href="spIEs.Html" title="a coded list of spies">spIEs menu</a></li>
<li><a href="vertical.Html" title="a horizontal vertical menu">vertical menu</a></li>
<li><a href="expand.Html" title="an enlarging unordered list">enlarging list</a></li>
<li><a href="enlarge.Html" title="an unordered list with link images">link images</a></li>
<li><a href="cross.Html" title="non-rectangular links">non-rectangular</a></li>
<li><a href="jigsaw.Html" title="jigsaw links">jigsaw links</a></li>
<li><a href="circles.Html" title="circular links">circular links</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../layouts/index.Html">LAYOUTS</a>
<!--[if lte IE 6]>
<a href="../layouts/index.Html">LAYOUTS
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../layouts/bodyfix.Html" title="Cross browser fixed layout">Fixed 1</a></li>
<li><a href="../layouts/body2.Html" title="Cross browser fixed layout">Fixed 2</a></li>
<li><a href="../layouts/body4.Html" title="Cross browser fixed layout">Fixed 3</a></li>
<li><a href="../layouts/body5.Html" title="Cross browser fixed layout">Fixed 4</a></li>
<li><a href="../layouts/minimum.Html" title="A simple minimum width layout">minimum width</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../boxes/index.Html">BOXES</a>
<!--[if lte IE 6]>
<a href="../boxes/index.Html">BOXES
<table><tr><td>
<![endif]-->
<ul>
<li><a href="spIEs.Html" title="a coded list of spies">spIEs menu</a></li>
<li><a href="vertical.Html" title="a horizontal vertical menu">vertical menu</a></li>
<li><a href="expand.Html" title="an enlarging unordered list">enlarging list</a></li>
<li><a href="enlarge.Html" title="an unordered list with link images">link images</a></li>
<li><a href="cross.Html" title="non-rectangular links">non-rectangular</a></li>
<li><a href="jigsaw.Html" title="jigsaw links">jigsaw links</a></li>
<li><a href="circles.Html" title="circular links">circular links</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../mozilla/index.Html">MOZILLA</a>
<!--[if lte IE 6]>
<a href="../mozilla/index.Html">MOZILLA
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../mozilla/dropdown.Html" title="A drop down menu">drop down menu</a></li>
<li><a href="../mozilla/cascade.Html" title="A cascading menu">cascading menu</a></li>
<li><a href="../mozilla/content.Html" title="Using content:">content:</a></li>
<li><a href="../mozilla/moxbox.Html" title=":hover applied to a div">mozzIE box</a></li>
<li><a href="../mozilla/rainbow.Html" title="I can build a rainbow">rainbow box</a></li>
<li><a href="../mozilla/snooker.Html" title="Snooker cue">snooker cue</a></li>
<li><a href="../mozilla/target.Html" title="Target Practise">target practise</a></li>
<li><a href="../mozilla/splittext.Html" title="Two tone headings">two tone headings</a></li>
<li><a href="../mozilla/shadow_text.Html" title="Shadow text">shadow text</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../IE/index.Html">EXPLORER</a>
<!--[if lte IE 6]>
<a href="../IE/index.Html">EXPLORER
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../IE/exampleone.Html" title="Example one">example one</a></li>
<li><a href="../IE/weft.Html" title="Weft fonts">weft fonts</a></li>
<li><a href="../IE/exampletwo.Html" title="Vertical align">vertical align</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../opacity/index.Html">OPACITY</a>
<!--[if lte IE 6]>
<a href="../opacity/index.Html">OPACITY
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../opacity/colours.Html" title="colour wheel">opaque colours</a></li>
<li><a href="../opacity/picturemenu.Html" title="a menu using opacity">opaque menu</a></li>
<li><a href="../opacity/png.Html" title="partial opacity">partial opacity</a></li>
<li><a href="../opacity/png2.Html" title="partial opacity II">partial opacity II</a></li>
<li><a class="hide" href="../menu/hover_click.Html" title="Hover/click with no active/focus borders">< HOVER/CLICK</a>
<!--[if lte IE 6]>
<a class="sub" href="../menu/hover_click.Html" title="Hover/click with no active/focus borders">< HOVER/CLICK
<table><tr><td>
<![endif]-->
<ul class="left">
<li><a href="../menu/form.Html" title="Styling forms">styled form</a></li>
<li><a href="../menu/nodots.Html" title="Removing active/focus borders">active focus</a></li>
<li><a href="../menu/hover_click.Html" title="Hover/click with no active/focus borders">hover/click</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
</ul>
</div>
</body>
</Html>