css如何做向上拉出的菜单

html-css021

css如何做向上拉出的菜单,第1张

一般来说弹出和拉出的菜单都是用JS实现的，因为这属于行为的范畴，CSS只负责外观显示。如果非要用CSS实现的话也可以，做一个链接的伪类

a:hover

然后修改菜单长宽和位置。

<!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/htmlcharset=utf-8" />

<title>upmenu-水平竖弹向上三级弹出菜单</title>

<style type="text/css">

/* common styling */

.menu {font-family: verdana, arial, sans-serifwidth:735pxposition:relativefont-size:11pxmargin:50px auto}

.menu ul li a, .menu ul li a:visited {display:blocktext-decoration:nonewidth:94pxheight:25pxtext-align:leftcolor:#000padding-left:10pxborder:1px solid #fffborder-width:0 1px 1px 0background:#c9c9a7line-height:25pxfont-size:11px}

.menu ul {padding:0margin:0list-style-type: none}

.menu ul li {float:leftposition:relative}

.menu ul li ul {display: none}

/* specific to non IE browsers */

.menu ul li:hover a {color:#000background:#e9e9c7}

.menu ul li:hover ul {display:blockposition:absolutebottom:26pxleft:0}

.menu ul li:hover ul li a.hide {background:#a7c9c9color:#000}

.menu ul li:hover ul li {display:blockbackground:#fffcolor:#000width:199pxclear:both}

.menu ul li:hover ul li:hover a.hide {background:#dfc184color:#000}

.menu ul li:hover ul li ul {display: none}

.menu ul li:hover ul li a {display:blockbackground:#c9a7c9color:#000width:100%padding-left:10px}

.menu ul li:hover ul li a:hover {background:#dfc184color:#000}

.menu ul li:hover ul li:hover ul {display:blockposition:absoluteleft:210pxbottom:0}

.menu ul li:hover ul li:hover ul li a {background:#dfc184color:#000}

.menu ul li:hover ul li:hover ul li a:hover {background:#c9c9a7color:#000}

.menu ul li:hover ul.left {left:-105px}

.menu ul li:hover ul li:hover ul.left {left:-210pxwidth:209px}

</style>

<!--[if lte IE 6]>

<style type="text/css">

table {border-collapse:collapsemargin:0padding: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:#000background:#e9e9c7}

.menu ul li a:hover ul {display:blockposition:absolutebottom:26pxleft:0}

.menu ul li a:hover ul li {display:blockbackground:#fffcolor:#000width:199px}

.menu ul li a:hover ul li a.sub {background:#a7c9c9color:#000}

.menu ul li a:hover ul li a {display:blockbackground:#c9a7c9color:#000width: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:#dfc184color:#000}

.menu ul li a:hover ul li a:hover ul {visibility:visibleposition:absoluteleft:210pxbottom:0}

.menu ul li a:hover ul li a:hover ul li a {background:#dfc184color:#000}

.menu ul li a:hover ul li a:hover ul li a:hover {background:#c9c9a7color:#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>

<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>

定义级联菜单块的margin-top值为负值使其处于父块的外上边，在写css时应首先声明*{margin:0padding:0}将所有元素margin和padding的值规零，这样在定位时才不会出什么问题！