现在的下拉菜单是兼容性越来越好了，不用js的最好了，但如果能用最少的代码实现出效果，也是不错的第一个，用到的js,不过很短，也很明了 <style> *{font:normal normal 14px/1.5em "宋体";} li{list-style:none;} span{display:block;line-height:25px;} a{text-decoration:none;display:block;margin:5px;} .class1{ width:100px; height:25px; overflow-y:hidden; border:1px solid #ffe663; text-align:center; background:#fff2d9; } .class2{ width:100px; height:135px; overflow-y:hidden; border:1px solid #ffe663; text-align:center; background:#fff2d9; } a:hover{ border:1px dashed red; } </style> <div> <li onmouseover="this.className='class2'" onmouseout="this.className='class1'" class="class1"> <span>下挂菜单</span> <a href="#">万水千山</a> <a href="#">万种风情</a> <a href="#">万山千水</a> <a href="#">万马奔腾</a> </li> </div> [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行] 这一个也不错 <!-- saved from url=(0054)http://www.jluvip.com/works/css/dropmenu/dropmenu.html --> <title>THE ULTIMATE CSS ONLY DROPDOWN MENU</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <style type="text/css"> .menu { FONT-SIZE: 0.85em; WIDTH: 750px; FONT-FAMILY: verdana, sans-serif; POSITION: relative } .menu UL { PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px; LIST-STYLE-TYPE: none } .menu UL LI { FLOAT: left; POSITION: relative } .menu UL LI A { BORDER-RIGHT: #fff 1px solid; BORDER-TOP: #fff 1px solid; DISPLAY: block; PADDING-LEFT: 10px; BACKGROUND: #dfc184; BORDER-LEFT: #fff 0px solid; WIDTH: 139px; COLOR: #000; LINE-HEIGHT: 3em; BORDER-BOTTOM: #fff 0px solid; HEIGHT: 3em; TEXT-DECORATION: none } .menu UL LI A:visited { BORDER-RIGHT: #fff 1px solid; BORDER-TOP: #fff 1px solid; DISPLAY: block; PADDING-LEFT: 10px; BACKGROUND: #dfc184; BORDER-LEFT: #fff 0px solid; WIDTH: 139px; COLOR: #000; LINE-HEIGHT: 3em; BORDER-BOTTOM: #fff 0px solid; HEIGHT: 3em; TEXT-DECORATION: none } * HTML .menu UL LI A { WIDTH: 139px } .menu UL LI A:visited { WIDTH: 139px } .menu UL LI UL { DISPLAY: none } TABLE { FONT-SIZE: 1em; MARGIN: -1px; BORDER-COLLAPSE: collapse } .menu UL LI:hover A { BACKGROUND: #bd8d5e; COLOR: #fff } .menu UL LI:hover UL { MARGIN-TOP: 1px; DISPLAY: block; LEFT: 0px; WIDTH: 150px; POSITION: absolute; TOP: 3em } .menu UL LI:hover UL LI UL { DISPLAY: none } .menu UL LI:hover UL LI A { PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; BACKGROUND: #faeec7; PADDING-BOTTOM: 5px; WIDTH: 129px; COLOR: #000; LINE-HEIGHT: 1.2em; PADDING-TOP: 5px; HEIGHT: auto } .menu UL LI:hover UL LI A.drop { BACKGROUND: url(drop.png) #c9c9a7 no-repeat right bottom } .menu UL LI:hover UL LI A:hover { BACKGROUND: #c9c9a7; COLOR: #000 } .menu UL LI:hover UL LI:hover UL { DISPLAY: block; LEFT: 150px; WIDTH: 150px; POSITION: absolute; TOP: 0px } .menu UL LI:hover UL LI:hover UL.left { LEFT: -150px } </style> <!--[if lte IE 6]> <link rel="stylesheet" media="all" type="text/css" href="final_drop_ie.css" /> <![endif]--> <meta content="MSHTML 6.00.6000.16441" name="GENERATOR"> <div class="menu"> <ul> <li> <a class="drop" href="http://www.jluvip.com/works/css/menu/index.html">DEMOS<!--[if IE 7]> <!--></a><!--<![endif]--> <table> <tbody> <tr> <td> <ul> <li> <a title="The zero dollar ads page" href="http://www.jluvip.com/works/css/menu/zero_dollars.html">zero dollars advertising page</a> </li> <li> <a title="Wrapping text around images" href="http://www.jluvip.com/works/css/menu/embed.html">wrapping text around images</a> </li> <li> <a title="Styling forms" href="http://www.jluvip.com/works/css/menu/form.html">styled form</a> </li> <li> <a title="Removing active/focus borders" href="http://www.jluvip.com/works/css/menu/nodots.html">active focus</a> </li> <li> <a class="drop" title="Hover/click with no active/focus borders" href="http://www.jluvip.com/works/css/menu/hover_click.html">hover/click with no borders<!--[if IE 7]> <!--></a><!--<![endif]--> <table> <tbody> <tr> <td> <ul> <li> <a title="Styling forms" href="http://www.jluvip.com/works/css/menu/form.html">styled form</a> </li> <li> <a title="Removing active/focus borders" href="http://www.jluvip.com/works/css/menu/nodots.html">removing active/focus borders</a> </li> <li> <a title="Hover/click with no active/focus borders" href="http://www.jluvip.com/works/css/menu/hover_click.html">hover/click</a> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> <li class="upone"> <a title="Multi-position drop shadow" href="http://www.jluvip.com/works/css/menu/shadow_boxing.html">shadow boxing</a> </li> <li> <a title="Image Map for detailed information" href="http://www.jluvip.com/works/css/menu/old_master.html">image map for detailed information</a> </li> <li> <a title="fun with background images" href="http://www.jluvip.com/works/css/menu/bodies.html">fun with background images</a> </li> <li> <a title="fade-out scrolling" href="http://www.jluvip.com/works/css/menu/fade_scroll.html">fade scrolling</a> </li> <li> <a title="em size images compared" href="http://www.jluvip.com/works/css/menu/em_images.html">em image sizes compared</a> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> <li> <a href="http://www.jluvip.com/works/css/boxes/index.html">BOXES<!--[if IE 7]> --> </a><!--<![endif]--> <table> <tbody> <tr> <td> <ul> <li> <a title="a coded list of spies" href="http://www.jluvip.com/works/css/dropmenu/spies.html">a coded list of spies</a> </li> <li> <a title="a horizontal vertical menu" href="http://www.jluvip.com/works/css/dropmenu/vertical.html">vertical menu</a> </li> <li> <a title="an enlarging unordered list" href="http://www.jluvip.com/works/css/dropmenu/expand.html">enlarging unordered list</a> </li> <li> <a title="an unordered list with link images" href="http://www.jluvip.com/works/css/dropmenu/enlarge.html">link images</a> </li> <li> <a title="non-rectangular links" href="http://www.jluvip.com/works/css/dropmenu/cross.html">non-rectangular</a> </li> <li> <a title="jigsaw links" href="http://www.jluvip.com/works/css/dropmenu/jigsaw.html">jigsaw links</a> </li> <li> <a title="circular links" href="http://www.jluvip.com/works/css/dropmenu/circles.html">circular links</a> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> <li> <a href="http://www.jluvip.com/works/css/mozilla/index.html">MOZILLA<!--[if IE 7]> <!--></a><!--<![endif]--> <table> <tbody> <tr> <td> <ul> <li> <a title="A drop down menu" href="http://www.jluvip.com/works/css/mozilla/dropdown.html">drop down menu</a> </li> <li> <a title="A cascading menu" href="http://www.jluvip.com/works/css/mozilla/cascade.html">cascading menu</a> </li> <li> <a title="Using content:" href="http://www.jluvip.com/works/css/mozilla/content.html">content:</a> </li> <li> <a title=":hover applied to a div" href="http://www.jluvip.com/works/css/mozilla/moxbox.html">mozzie box</a> </li> <li> <a title="I can build a rainbow" href="http://www.jluvip.com/works/css/mozilla/rainbow.html">I can build a rainbow with transparent borders</a> </li> <li> <a title="Snooker cue" href="http://www.jluvip.com/works/css/mozilla/snooker.html">a snooker cue using border art</a> </li> <li> <a title="Target Practise" href="http://www.jluvip.com/works/css/mozilla/target.html">target practise</a> </li> <li> <a title="Two tone headings" href="http://www.jluvip.com/works/css/mozilla/splittext.html">two tone headings</a> </li> <li> <a title="Shadow text" href="http://www.jluvip.com/works/css/mozilla/shadow_text.html">shadow text</a> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> <li> <a href="http://www.jluvip.com/works/css/ie/index.html">EXPLORER<!--[if IE 7]> <!--></a><!--<![endif]--> <table> <tbody> <tr> <td> <ul> <li> <a title="Example one" href="http://www.jluvip.com/works/css/ie/exampleone.html">the first example for Internet Explorer</a> </li> <li> <a title="Weft fonts" href="http://www.jluvip.com/works/css/ie/weft.html">weft fonts</a> </li> <li> <a title="Vertical align" href="http://www.jluvip.com/works/css/ie/exampletwo.html">vertically aligning text</a> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> <li> <a href="http://www.jluvip.com/works/css/opacity/index.html">OPACITY<!--[if IE 7]> <!--></a><!--<![endif]--> <table> <tbody> <tr> <td> <ul> <li> <a title="colour wheel" href="http://www.jluvip.com/works/css/opacity/colours.html">a colour wheel using opaque colours</a> </li> <li> <a title="a menu using opacity" href="http://www.jluvip.com/works/css/opacity/picturemenu.html">a menu using opacity</a> </li> <li> <a title="partial opacity" href="http://www.jluvip.com/works/css/opacity/png.html">partial opacity</a> </li> <li> <a title="partial opacity II" href="http://www.jluvip.com/works/css/opacity/png2.html">partial opacity II</a> </li> <li> <a class="drop" title="Hover/click with no active/focus borders" href="http://www.jluvip.com/works/css/menu/hover_click.html">HOVER/CLICK<!--[if IE 7]> <!--></a><!--<![endif]--> <table> <tbody> <tr> <td> <ul class="left"> <li> <a title="Styling forms" href="http://www.jluvip.com/works/css/menu/form.html">styled form</a> </li> <li> <a title="Removing active/focus borders" href="http://www.jluvip.com/works/css/menu/nodots.html">removing active/focus borders</a> </li> <li> <a title="Hover/click with no active/focus borders" href="http://www.jluvip.com/works/css/menu/hover_click.html">hover/click</a> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> </ul> </td> </tr> </tbody> </table> <!--[if lte IE 6]> </a> <![endif]--> </li> </ul> </div>
