And (filter) selector
##:first
Usage:$("tr:first");A collection of single elements
Match the first element found
##:last
:no(selector)
Matches all elements with even index values, counting from 0
##:odd
Match all elements with odd index values, counting from 0
:eq(index)
Matches an element with a given index value, counting from 0
:gt(index)
Matches all elements greater than the given index value, counting from 0
##:lt(index)
Matches all elements less than the given index value, counting from 0
##:header
matches such as h1, Title elements such as h2, h3
<!DOCTYPE html>
<html>
<head>
<title>php.cn</title>
<meta charset="utf-8" />
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script >
function f1(){
//$("li").css('background-color','blue');
//① :first 找到第一个
//li元素同时，还需要是第一个
$("li:first").css('background-color','blue');
//② :last 找到最后一个
$("li:last").css('background-color','green');
//③ :eq(下标) 下标从0计算, equal()
$("li:eq(4)").css('background-color','pink');
//④ :gt(索引值) 下标大于条件索引值, great than
$("li:gt(4)").css('color','red');
//⑤ :lt(索引值) 下标小于条件索引值, less than
$("li:lt(3)").css('color','orange');
//⑥ :even 下标索引值等于偶数的
$("li:even").css('background-color','gray');
//⑦ :odd 下标索引值等于奇数的
$("li:odd").css('color','red');
//⑧ :not(选择器) 去除与“选择器”匹配的元素
$("li:not(#zhao,#zhang)").css('color','red');
//⑨ :header 获得h1/h2/h3...的标题元素
$(":header").css('color','blue');
}
</script>
</head>
<body>
<h1>php.cn</h1>
<h2>php.cn</h2>
<h3>php.cn</h3>
<h4>php.cn</h4>
<ul>
<li>北京</li>
<li id="zhang">上海</li>
<li>广州</li>
<li id="zhao">深圳</li>
<li>杭州</li>
<li>武汉</li>
<li>南京</li>
<li>天津</li>
</ul>
<input type="button" value="触发" onclick="f1()" />
</body>
</html>Next Section