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<%@ page language= "java" import= "java.util.*" pageEncoding= "UTF-8" %>
<% String path = request.getContextPath(); String basePath = request.getScheme()+ "://" +request.getServerName()+ ":" +request.getServerPort()+path+ "/" ;
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
<html> <head>
<base href= "<%=basePath%>" >
<title>My JSP 'test3.jsp' starting page</title>
<meta http-equiv= "pragma" content= "no-cache" >
<meta http-equiv= "cache-control" content= "no-cache" >
<meta http-equiv= "expires" content= "0" >
<meta http-equiv= "keywords" content= "keyword1,keyword2,keyword3" >
<meta http-equiv= "description" content= "This is my page" >
<!--
<link rel= "stylesheet" type= "text/css" href= "styles.css" >
-->
<script src= "js/jquery-2.1.1.min.js" ></script>
<script>
//this对象是指在运行时期基于执行环境所绑定的
//this总是指向调用者
var k=10;
function test(){
this .k=20;
}
//alert(test.k); //test()函数未执行,输出undefined
//调用test()相当于调用window.test(),test内部的this指向window对象,改变了全局变量的k的值
test();
alert(k); //20相当于widow.k,输出20,window一般省略
</script>
</head>
<body>
This is my JSP page. <br>
</body>
</html> |
本文转自 matengbing 51CTO博客,原文链接:http://blog.51cto.com/matengbing/1879005