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【代码片段】jQuery测试更多元素集合

2013-03-05 19:32 363 查看 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>第3章示例5</title>
<style type="text/css">
body { width:780px; }
div,p,h3,span { border:4px solid black; background-color:green; color:white; float:left; margin:6px; padding:5px; font:bold 14px/1 Arial,Helvetica,sans-serif; width:220px; display:block; }
div p,div span { width:205px; border-width:2px; margin:5px 0; float:none; }
p span { width:193px; border-width:1px;}
h3 { margin-right:500px; }
.clear { clear:both; }
.relative { position:relative; }
.highlight { background-color:gold; color:black; }
form { clear:both; font:bold 14px/1 Arial,Helvetica,sans-serif; }
button { font:bold 16px/1 Arial,Helvetica,sans-serif; margin:1px 3px; padding:2px; cursor:pointer; }
</style>
<script src="http://code.jquery.com/jquery-1.9.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){$("*").removeClass("highlight");});
$("#btn1").click(function(){$("div").add("p:last").addClass("highlight");});
$("#btn2").click(function(){$("body").children(":eq(3)").prevAll("[class]").andSelf().addClass("highlight");});
$("#btn3").click(function(){$("body").children(":eq(3)").prevAll("[class]").andSelf().andSelf().addClass("highlight");});
$("#btn4").click(function(){$("body").children(":eq(3)").prevAll("[class]").andSelf().children("p").andSelf().addClass("highlight");});
});
</script>
</head>
<body>
<div class="clear">
<div class="clear">
<p>
<p>
<span><span> </span></span>
</p>
</p>
</div>
</div>
<div>
<div>
<p><p> </p></p>
<p><p> </p></p>
<p><p> </p></p>
</div>
</div>
<div class="relative">
<div class="relative">
<span><span> </span></span>
<span><span> </span></span>
<span class="clear"><span class="clear"> </span></span>
</div>
</div>
<h3 class="clear"><h3 class="clear"> </h3></h3>
<div class="clear">
<div class="clear">
<p>
<p>
<span><span> </span></span>
<span><span> </span></span>
</p>
</p>
<p>
<p>
<span><span> </span></span>
<span><span> </span></span>
</p>
</p>
</div>
</div>
<div>
<div>
<p><p> </p></p>
<p><p> </p></p>
<p><p> </p></p>
</div>
</div>
<div class="relative">
<div class="relative">
<span><span> </span></span>
<span><span> </span></span>
<span class="clear"><span class="clear"> </span></span>
</div>
</div>
<form>
<button type="button" id="btn1">$("div").add("p:last")</button>
<button type="button" id="btn2">$("body").children(":eq(3)").prevAll("[class]").andSelf()</button>
<button type="button" id="btn3">$("body").children(":eq(3)").prevAll("[class]").andSelf().andSelf()</button>
<button type="button" id="btn4">$("body").children(":eq(3)").prevAll("[class]").andSelf().children("p").andSelf()</button>
</form>
</body>
</html>


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