1、选择器：
<body>
<script src="jquery-2.2.4.js"></script>
<div id="n1"></div>
<div class="n2"></div>
<div></div>
<a></a>
<script>
$('#n1').text('ahaii')//id选择器，
$('.n2').text('nancy')//class选择器
$('div').text('xxxooo')//标签选择器，所有div标签的值全设置为xxxooo
$('#n1,.n2,a').text('python')//将id为ni，类标签为n2和所有a标签的值都设置为python
</script>
</body>
菜单实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title> <style>
.menu{
float: left; width: 30%; height: 500px; background-color: antiquewhite;
} .content{
float: left; width: 70%; height: 500px; background-color: blue;
} .title{
background-color: black;
color: white;
height: 50px;
line-height: 50px;
} .hide{
display: none;
} </style> </head>
<body>
<div>
<div class="menu">
<div class="item">
<div class="title" onclick="func(this);">菜单一</div>
<div class="body">
<div>1.1</div>
<div>1.2</div>
<div>1.3</div>
</div>
</div> <div class="item">
<div class="title" onclick="func(this);">菜单二</div>
<div class="body hide">
<div>2.1</div>
<div>2.2</div>
<div>2.3</div>
</div>
</div> <div class="item">
<div class="title" onclick="func(this);">菜单三</div>
<div class="body hide">
<div>3.1</div>
<div>3.2</div>
<div>3.3</div>
</div>
</div> </div>
</div> <div class="content"></div> <script src="jquery-2.2.4.js"></script> <script type="text/javascript">
function func(ths){
$(ths).next().removeClass('hide'); //$(ths)获取当前标签，next()方法获取当前标签的下一个标签，removeClass()删除样式
$(ths).parent().siblings().find('.body').addClass('hide'); //先获取父标签item，然后在父标签的兄弟标签中查找body标签
}
// $(function(){
// $('.title').click(function(){
// $(this).parent().siblings().find('.body').addClass('hide');
// $(this).next().removeClass('hide');
// });
// });
</script>
</body>
</html>
Tab菜单选项
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.head-box{
background-color: #B0E0E6;
border: 1px blueviolet;
height: 40px;
line-height: 40px;
} .head-box a{
border-right: 1px solid burlywood;
padding: 12px;
} .hide{
display: none;
} .current{
/*background-color: red;*/
/*color: white;*/
background-color: white;
color: black;
}
</style>
</head>
<body> <div class="head-box">
<a ahaii="c1" onclick="func(this);" class="current">菜单一</a>
<a ahaii="c2" onclick="func(this);">菜单二</a>
<a ahaii="c3" onclick="func(this);">菜单三</a>
</div> <div class="body-box">
<div id="c1">内容一</div>
<div id="c2" class="hide">内容二</div>
<div id="c3" class="hide">内容三</div>
</div> <script src="jquery-2.2.4.js"></script>
<script>
function func(ths){
$(ths).addClass('current').siblings().removeClass('current');
var contendID = '#' + $(ths).attr('ahaii'); //取自定义属性‘ahaii’对应的值，即c1
$(contendID).removeClass('hide').siblings().addClass('hide'); //$(contentID)=$(#c1)
}
</script>
</body>
</html>
全选、取消和反选实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title> </head>
<body>
<div>
<table border="1px">
<input type="button" value="全选" onclick="selectall();">
<input type="button" value="取消" onclick="removeall();">
<input type="button" value="反选" onclick="reverse();">
<tr>
<td><input type="checkbox"></td>
<td>123</td>
</tr> <tr>
<td><input type="checkbox"></td>
<td>123</td>
</tr> <tr>
<td><input type="checkbox"></td>
<td>123</td>
</tr> </table>
</div> <script src="jquery-2.2.4.js"></script>
<script>
function selectall(){
$('table :checkbox').prop('checked',true); //$('table :checkbox')表示table标签下的所有checkbox，prop更改checked，相当于checked=‘checked’
} function removeall(){
$('table :checkbox').prop('checked',false);
} function reverse(){
$('table :checkbox').each(function(){ //创建包含每个checkbox的列表
var isSelected = $(this).prop('checked'); //$(this)表示每个checkbox，若选中，$(this).prop('checked')值为true
if (isSelected){
$(this).prop('checked',false);
}
else {
$(this).prop('checked',true);
}
}); }
</script>
</body>
</html>
for循环中each()方法的使用：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script src="jquery-2.2.4.js"></script> <script>
var List = [11,22,33,44,55]
$.each(List,function(index,value){
console.log(index,value);
});
</script>
</body>
</html> 输出：
0 11
1 22
2 33
3 44
4 55
toggleClass:
对类的操作，如果存在该类，就删除。如果不存在该类，就添加。
http://www.cnblogs.com/wupeiqi/articles/5369773.html