编辑以包含我最喜欢的扩展列表 javascript
/*
CollapsibleLists.js
An object allowing lists to dynamically expand and collapse
Created by Stephen Morley - http://code.stephenmorley.org/ - and released under
the terms of the CC0 1.0 Universal legal code:
http://creativecommons.org/publicdomain/zero/1.0/legalcode
*/
// create the CollapsibleLists object
var CollapsibleLists =
new function(){
/* Makes all lists with the class 'collapsibleList' collapsible. The
* parameter is:
*
* doNotRecurse - true if sub-lists should not be made collapsible
*/
this.apply = function(doNotRecurse){
// loop over the unordered lists
var uls = document.getElementsByTagName('ul');
for (var index = 0; index < uls.length; index ++){
// check whether this list should be made collapsible
if (uls[index].className.match(/(^| )collapsibleList( |$)/)){
// make this list collapsible
this.applyTo(uls[index], true);
// check whether sub-lists should also be made collapsible
if (!doNotRecurse){
// add the collapsibleList class to the sub-lists
var subUls = uls[index].getElementsByTagName('ul');
for (var subIndex = 0; subIndex < subUls.length; subIndex ++){
subUls[subIndex].className += ' collapsibleList';
}
}
}
}
};
/* Makes the specified list collapsible. The parameters are:
*
* node - the list element
* doNotRecurse - true if sub-lists should not be made collapsible
*/
this.applyTo = function(node, doNotRecurse){
// loop over the list items within this node
var lis = node.getElementsByTagName('li');
for (var index = 0; index < lis.length; index ++){
// check whether this list item should be collapsible
if (!doNotRecurse || node == lis[index].parentNode){
// prevent text from being selected unintentionally
if (lis[index].addEventListener){
lis[index].addEventListener(
'mousedown', function (e){ e.preventDefault(); }, false);
}else{
lis[index].attachEvent(
'onselectstart', function(){ event.returnValue = false; });
}
// add the click listener
if (lis[index].addEventListener){
lis[index].addEventListener(
'click', createClickListener(lis[index]), false);
}else{
lis[index].attachEvent(
'onclick', createClickListener(lis[index]));
}
// close the unordered lists within this list item
toggle(lis[index]);
}
}
};
/* Returns a function that toggles the display status of any unordered
* list elements within the specified node. The parameter is:
*
* node - the node containing the unordered list elements
*/
function createClickListener(node){
// return the function
return function(e){
// ensure the event object is defined
if (!e) e = window.event;
// find the list item containing the target of the event
var li = (e.target ? e.target : e.srcElement);
while (li.nodeName != 'LI') li = li.parentNode;
// toggle the state of the node if it was the target of the event
if (li == node) toggle(node);
};
}
/* Opens or closes the unordered list elements directly within the
* specified node. The parameter is:
*
* node - the node containing the unordered list elements
*/
function toggle(node){
// determine whether to open or close the unordered lists
var open = node.className.match(/(^| )collapsibleListClosed( |$)/);
// loop over the unordered list elements with the node
var uls = node.getElementsByTagName('ul');
for (var index = 0; index < uls.length; index ++){
// find the parent list item of this unordered list
var li = uls[index];
while (li.nodeName != 'LI') li = li.parentNode;
// style the unordered list if it is directly within this node
if (li == node) uls[index].style.display = (open ? 'block' : 'none');
}
// remove the current class from the node
node.className =
node.className.replace(
/(^| )collapsibleList(Open|Closed)( |$)/, '');
// if the node contains unordered lists, set its class
if (uls.length > 0){
node.className += ' collapsibleList' + (open ? 'Open' : 'Closed');
}
}
}();
推荐的Html是
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Vakram Mohan Help</title>
<link rel="stylesheet" href="reset.css" />
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:regular,bold,italic,thin,light,bolditalic,black,medium&lang=en">
<script type="text/javascript" src="CollapsibleLists.js"></script>
</head>
<body>
<div>
<UL id="Mainmenu">
<li>
<h2><span>Menu</span></h2>
<ul>
<li> <span><a onclick=“window.location.reload()”>Home</a></span></li>
<li><span><a href="#" onclick="return btntest_onclick()">About us</a></span>
<ul>
<li><span><a href=“#”>Domestic</a></span></li>
<li><span><a href=“#”>International</a></span></li>
</ul>
</li>
</ul>
</li><!--Menu end -->
</UL> <!-- Main Menu end -->
</body>
<script language="javascript" type="text/javascript">
function btntest_onclick()
{
window.location.href = "http://www.google.com";
}
</script>
<script>
CollapsibleLists.applyTo(document.getElementById('Mainmenu'));
</script>
</head>
</html>
请注意，我没有使用您的 CSS 文件。
真是一团糟
#para1 {
text-align: center;
color: red;
}
这是一个 ID 选择器
.center {
text-align: center;
color: red;
}
这是一个类选择器。
Reset.css 在这里
html, body, header, footer, hgroup, nav, main, article, section, figure, figcaption, h1, h2, h3, ul, li, body, div, p, img
{
margin: 0;
padding: 0;
font-size: 100%;
vertical-align: baseline;
border: 0;
}