<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="css/style.css" />
<script src="js/jquery-1.8.3.js"></script>
<script>
$(function(){
$("#btn1").click(function(){
$("#one").css("background","pink");
});
$("#btn2").click(function(){
$(".mini").css("background","pink");
});
$("#btn3").click(function(){
$("div").css("background","pink");
});
$("#btn4").click(function(){
$("*").css("background","pink");
});
$("#btn5").click(function(){
$("#two .mini").css("background","pink");
});
});
</script>
</head>
<body>
<input type="button" id="btn1" value="选择id为one的元素"/>
<input type="button" id="btn2" value="选择样式值为mini的元素"/>
<input type="button" id="btn3" value="选择所有的duv元素"/>
<input type="button" id="btn4" value="选择所有元素" />
<input type="butto" id="btn5" value="选择id为two并且样式为mini的元素"/>
<div id="one">
<div class="mini">
1111111111
</div>
</div>
<div id="two">
<div class="mini">
222222222
</div>
<div class="mini">
3333333
</div>
</div>
<div id="three">
<div class="mini">
44444444
</div>
<div class="mini">
5555555
</div>
<div class="mini">
6666666
</div>
</div>
<span id="four"></span>
</body>
</html>