javascript静态树菜单实现代码_导航菜单

2020-11-27 来源：意榕旅游网

谁有兴趣的话可以改成动态加载数据，或者用jquery，代码肯定会少很多！我发现添加一些css，这棵树在静态页面还是大有用途的！

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<style type="text/css"> 
.expand{ 
cursor:pointer; 
} 
.hide{ 
cursor:pointer; 
} 
</style> 
<script type="text/javascript"> 
function toggleChild(o) 
{ 
var cls = o.getAttribute("class"); 
if (cls == "expand") 
{ 
var sb = o.nextSibling; 
if (window.innerWidth) sb = sb.nextSibling; 
while (sb != null && sb.tagName.toLowerCase() == 'dd') 
{ 
sb.style.display = "none"; 
sb = sb.nextSibling; 
if (window.innerWidth) sb = sb.nextSibling; 
} 
o.removeAttribute("class"); 
o.setAttribute("class", "hide"); 
if (window.innerWidth) //ff 
o.textContent = "田" + o.textContent.substring(1); 
else 
o.innerText = "田" + o.innerText.substring(1); 
} 
else 
{ 
var sb = o.nextSibling; 
if (window.innerWidth) sb = sb.nextSibling; 
while (sb != null && sb.tagName.toLowerCase() == 'dd') 
{ 
sb.style.display = ""; 
sb = sb.nextSibling; 
if (window.innerWidth) sb = sb.nextSibling; 
} 
o.removeAttribute("class"); 
o.setAttribute("class", "expand"); 
if (window.innerWidth) //ff 
o.textContent = "曰" + o.textContent.substring(1); 
else 
o.innerText = "曰" + o.innerText.substring(1); 
} 
} 
function maketree(obj) 
{ 
var dts = obj.getElementsByTagName('dt'); 
for (var i = 0; i < dts.length; i++) 
{ 
dts[i].setAttribute("class", "expand"); 
if (window.innerWidth) //ff 
dts[i].textContent = "曰" + dts[i].textContent; 
else 
dts[i].innerText = "曰" + dts[i].innerText; 
dts[i].onclick = function() { toggleChild(this); }; 
} 
} 
window.onload = function() 
{ 
maketree(document.getElementById("tree")); 
}; 
</ script> 
</head> 
<body> 
<h3>定义列表也能变成一棵树：</h3> 
 
菜单1 
1.1 aaa 
1.2 bbb 
1.3 ccc 
菜单2 
2.1 你好 
超链接 
菜单3 
 
 
3.1 
百度新闻 
搜狐新闻 
3.2 
百度新闻 
搜狐新闻 
 
 
 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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javascript静态树菜单实现代码_导航菜单