JavaScript多级下拉菜单代码(简单实用)

JavaScript下拉菜单

* {
padding:0;
margin:0;
}
body {
font-family:verdana, sans-serif;
font-size:small;
}
#navigation, #navigation li ul {
list-style-type:none;
}
#navigation {
margin:20px;
}
#navigation li {
float:left;
text-align:center;
position:relative;
}
#navigation li a:link, #navigation li a:visited {
display:block;
text-decoration:none;
color:#000;
width:120px;
height:40px;
line-height:40px;
border:1px solid #fff;
border-width:1px 1px 0 0;
background:#c5dbf2;
padding-left:10px;
}
#navigation li a:hover {
color:#fff;
background:#2687eb;
}
#navigation li ul li a:hover {
color:#fff;
background:#6b839c;
}
#navigation li ul {
display:none;
position:absolute;
top:40px;
left:0;
margin-top:1px;
width:120px;
}
#navigation li ul li ul {
display:none;
position:absolute;
top:0px;
left:130px;
margin-top:0;
margin-left:1px;
width:120px;
}

function displaySubMenu(li) {
var subMenu = li.getElementsByTagName("ul")[0];
subMenu.style.display = "block";
}
function hideSubMenu(li) {
var subMenu = li.getElementsByTagName("ul")[0];
subMenu.style.display = "none";
}

• 栏目1
  • 栏目1->菜单1
  • 栏目1->菜单2
  • 栏目1->菜单3
  • 栏目1->菜单4
• 栏目2
  • 栏目2->菜单1
  • 栏目2->菜单2
  • 栏目2->菜单3
  • 栏目2->菜单4
  • 栏目2->菜单5
• 栏目3
  • 栏目3->菜单1
    • 菜单1->子菜单1
    • 菜单1->子菜单2
    • 菜单1->子菜单3
    • 菜单1->子菜单4
  • 栏目3->菜单2
  • 栏目3->菜单3
    • 菜单3->子菜单1
    • 菜单3->子菜单2
    • 菜单3->子菜单3

[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]