这个符合设计标准的三级向上弹出菜单，纯css代码控制，没有使用javascript脚本，绿色环保，呵呵。兼容性应该更好。更多关于菜单的文章
截图：
<!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=utf-8" /> <title>upmenu-水平竖弹向上三级弹出菜单- 中国asp之家</title> <style type="text/css"> /* common styling */ .menu {font-family: verdana, arial, sans-serif; width:735px; position:relative; font-size:11px; margin:50px auto;} .menu ul li a, .menu ul li a:visited {display:block; text-decoration:none; width:94px; height:25px; text-align:left; color:#000; padding-left:10px; border:1px solid #fff; border-width:0 1px 1px 0; background:#c9c9a7; line-height:25px; font-size:11px;} .menu ul {padding:0; margin:0;list-style-type: none; } .menu ul li {float:left; position:relative;} .menu ul li ul {display: none;} /* specific to non IE browsers */ .menu ul li:hover a {color:#000; background:#e9e9c7;} .menu ul li:hover ul {display:block; position:absolute; bottom:26px; left:0;} .menu ul li:hover ul li a.hide {background:#a7c9c9; color:#000;} .menu ul li:hover ul li {display:block; background:#fff; color:#000;width:199px; clear:both;} .menu ul li:hover ul li:hover a.hide {background:#dfc184; color:#000;} .menu ul li:hover ul li ul {display: none;} .menu ul li:hover ul li a {display:block; background:#c9a7c9; color:#000; width:100%; padding-left:10px;} .menu ul li:hover ul li a:hover {background:#dfc184; color:#000;} .menu ul li:hover ul li:hover ul {display:block; position:absolute; left:210px; bottom:0;} .menu ul li:hover ul li:hover ul li a {background:#dfc184; color:#000;} .menu ul li:hover ul li:hover ul li a:hover {background:#c9c9a7; color:#000;} .menu ul li:hover ul.left {left:-105px;} .menu ul li:hover ul li:hover ul.left {left:-210px; width:209px;} </style> <!--[if lte IE 6]> <style type="text/css"> table {border-collapse:collapse; margin:0; padding:0;} .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:#000; background:#e9e9c7;} .menu ul li a:hover ul {display:block; position:absolute; bottom:26px; left:0;} .menu ul li a:hover ul li {display:block; background:#fff; color:#000; width:199px;} .menu ul li a:hover ul li a.sub {background:#a7c9c9; color:#000;} .menu ul li a:hover ul li a {display:block; background:#c9a7c9; color:#000; width:100%; padding-left:10px;} .menu ul li a:hover ul li a ul {visibility:hidden;} .menu ul li a:hover ul li a:hover {background:#dfc184; color:#000;} .menu ul li a:hover ul li a:hover ul {visibility:visible; position:absolute; left:210px; bottom:0;} .menu ul li a:hover ul li a:hover ul li a {background:#dfc184; color:#000;} .menu ul li a:hover ul li a:hover ul li a:hover {background:#c9c9a7; color:#000;} .menu ul li a:hover ul.left {left:-105px;} .menu ul li a:hover ul li a:hover ul.left {left:-210px;} </style> <![endif]--> </head> <body> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <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 class="left"> <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> <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> </ul> <!--[if lte IE 6]> </td></tr></table> </a> <![endif]--> </li> </ul> </div> </body> </html> [提示：你可先修改部分代码，再按运行]
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