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CSS combined with JS to make a drop-down menu of the specific implementation

Source: Internet
Author: User
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  This article mainly introduces the CSS combined with JS to make the implementation of the Drop-down menu, the need for friends can refer to the following

  Code as follows: <% @page pageencoding= "utf-8"   contenttype= "Text/html;charset=utf-8"%>    <html >  <HEAD>  <title>WebForm5</title>    <style>/* Root = horizontal, Secondary = Vertical */  ul#navmenu-h {  margin:0;  border:0 none;  padding:0; ; /*for khtml*/  list-style:none;  height:24px; }    ul#navmenu-h Li {  margin:0;  bo rder:0 none;  padding:0;  Float:left; /*for gecko*/  display:inline;  list-style:none;  position:relative;  height:24px;    Ul#navmenu-h ul {  margin:0;  border:0 none;  padding:0;  width:160px;  list-style:no ne;  display:none;  position:absolute;  top:24px;  left:0; }    ul#navmenu-h UL:AF ter/*from IE 7 lack of compliance*/{  clear:both;  display:block;  font:1px/0px serif;  Content: ".";   height:0;  visibility:hidden; }    ul#navmenu-h ul Li {  width:160px;  float:lef T /*for IE 7 Lack of compliance*/  display:block!important;  display:inline; /*for ie*/ }   /* Root Menu */  ul#navmenu-h a {  border:1px solid #FFF;  Border-right-co Lor: #CCC;  border-bottom-color: #CCC;  padding:0 6px;  float:none; /*for opera*/  Float:left; /*for ie*/  display:block;  background: #EEE;  color: #666;  font:bold 10px/22px Verdana, Arial, Hel Vetica, sans-serif;  text-decoration:none;  height:auto!important;  height:1%; /*for ie*/ }   /* Root Menu Hover persistence */  ul#navmenu-h a:hover,  ul#navmenu-h-Li:hover a,  ul#navmenu-h li.iehover A {  background: #CCC;  color: #FFF; }    * 2nd Menu */  Ul#navmenu-h li:hover Li a,  ul#navmenu-h li.iehover Li a {  float:none;  background: #EEE;  color: #666; }   /* 2nd Menu Hover Persistence * /  ul#navmenu-h li:hover li a:hover,  ul#navmenu-h li:hover li:hover a,  ul#navmenu-h li.iehover li A:hover ,  ul#navmenu-h li.iehover li.iehover a {  background: #CCC;  color: #FFF; }   /* 3rd Menu */  ul#navmenu-h li:hover li:hover li a,  ul#navmenu-h-li.iehover-li.iehover li a {  background: #EEE; &nbs P Color: #666; }   /* 3rd Menu Hover Persistence */  ul#navmenu-h li:hover li:hover Li a:hover,  Ul#navmenu-h li:hover li:hover li:hover a,  ul#navmenu-h li.iehover li.iehover li a:hover,  ul#navmenu-h Over Li.iehover li.iehover a {  background: #CCC;  color: #FFF; }   /* 4th Menu */  Ul#nav Menu-h li:hover li:hover li:hover li a, -ul#navmenu-h li.iehover-Li.iehover li.iehover li a {  background: #EEE;   color: #666; &nbSp }   /* 4th Menu Hover */  ul#navmenu-h li:hover li:hover li:hover li a:hover,  ul#navmenu-h li.iehove R li.iehover Li.iehover li a:hover {  background: #CCC;  color: #FFF; }    ul#navmenu-h ul ul,&n Bsp Ul#navmenu-h ul ul {  display:none;  position:absolute;  top:0;  left:160px; }  &nbs P /* Do not move-must Come before display:block for Gecko */  ul#navmenu-h li:hover ul ul,  ul#navmenu-h li:hove R ul ul ul,  Ul#navmenu-h li.iehover ul ul,  ul#navmenu-h Li.iehover ul ul {  display:none;  P   Ul#navmenu-h li:hover ul,  ul#navmenu-h ul li:hover ul,  ul#navmenu-h ul ul Li:hover ul,  -H li.iehover ul,  ul#navmenu-h ul li.iehover ul,  Ul#navmenu-h ul ul Li.iehover ul {  display:block;&nbsp ; }    </style><script language= "javascript" >  navhover = function () {  var lis = document. GetelemeNtbyid ("Navmenu-h"). getElementsByTagName ("LI");  for (var i=0; i<lis.length; i++) {  lis[i].onmouseover= function () {  this.classname+= "Iehover"; }  lis[i].onmouseout=function () {  This.className.replace (New RegExp ("Iehoverb"),    ""); } } }  if (window.attachevent) Window.attachevent ("onload", Navhover);  </script>  </HEAD>  <body>  <ul ID = "Navmenu-h" >  <li><a href= "#" >root nav item1</a>  <ul>  <li><a href= "#" >sub nav item1</a></li>  <li><a href= "#" >sub nav item1-2</a></li >  </ul>  </li>  <li><a href= "#" >root nav item2</a>  <ul>& nbsp <li><a href= "#" >sub nav item2</a></li>  <li><a href= "#" >Sub nav item2-2</ a></li>  </ul>  </li>  <li≫<a href= "#" >root nav item3</a>  <ul>  <li><a href= "#" >sub nav item3</a ></li>  <li><a href= "#" >sub nav item3-2</a></li>  </ul>  </ li>  </ul>  </body>  </html>   

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