jQuery attr removeAttr 属性操作

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%String path = request.getContextPath();String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>">
<meta charset="UTF-8">
<title>b index</title>
<link rel='stylesheet' type="text/css" href='b/css/bootstrap.css'>
</head>
<body style="margin:150px;"><div id="div001">div001</div><div id="div002">div002</div><div id="div003">div003</div><div><button id="btn001">click me to use attr set string attr</button><button id="btn002">click me to use attr get attr</button><button id="btn003">click me to use attr set obj attr</button><button id="btn004">click me to use removeAttr string</button><button id="btn005">click me to use removeAttr obj</button><button id="btn006">click me to use attr set fn attr</button></div><script type="text/javascript" src="js/jquery-1.11.1.js"></script><script type="text/javascript" src="b/js/bootstrap.js"></script><script type="text/javascript" src="js/index031.js"></script>
</body>
</html>

$(function() {$('#btn001').click(btn001Click);$('#btn002').click(btn002Click);$('#btn003').click(btn003Click);$('#btn004').click(btn004Click);$('#btn005').click(btn005Click);$('#btn006').click(btn006Click);
});
function btn001Click() {$('#div001').attr('a', 'a');
}
function btn002Click() {// 如果没有设置a属性，会得到undefined；var string = $('#div001').attr('a');console.log(string);
}
function btn003Click() {var obj = {'a' : 'a','b' : 'b'};$('#div001').attr(obj);
}
function btn004Click() {// 必须有输入参数，否则没有效果；$('#div001').removeAttr();// 输入'a','b'只会删除'a'的属性；输入['a','b']会报错；$('#div001').removeAttr('a', 'b');
}
function btn005Click() {var obj = {'a' : 'a','b' : 'b'};// 输入一个对象会报错的；try {$('#div001').removeAttr(obj);} catch (e) {console.log(e);}
}
function btn006Click() {$('#div002').attr('title', function() {// return this.id;// 这样也是可以的；返回一个字符串就可以了；return 'asdf';});
}