<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
window.onload = function() {
//1. Get the a node and add the onclick response function to it
document.getElementsByTagName("a")[0].onclick = function() {
//3. Create an XMLHttpRequest object
var request = new XMLHttpRequest();
//4. Prepare to send the requested data: url;
var url = this.href;
var method = "GET";
//5. Call the open method of the XMLHttpRequest object
request.open(method, url);
//6. Call the send method of the XMLHttpRequest object
request.send(null);
//7. Add onreadystatechange response function to XMLHttpRequest object
request.onreadystatechange = function() {
//8. To judge whether the response is complete, when the readyState property value of the XMLHttpRequest object is 4
if (request.readyState == 4) {
//9. Then judge whether the response is available: the value of the status attribute of the XMLHttpRequest object is 200
if (request.status == 200 || request.status==304) {
alert(request.responseText);
}
}
}
//2. Cancel the default behavior of a node
return false;
}
}
</script>
</head>
<body>
<a href="hallow.txt">hallow</a>
</body>
</html>