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java ajax 整个过程..

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Java

        var request = new XMLHttpRequest();
        var method = "GET";
        var url = this.href + "?time=" + new Date();

        request.open(method, url);
        request.send(null);

        request.onreadystatechange = function() {
            if (request.readyState == 4) {
                if (request.status == 200 || request.status == 304) {
                    alert(request.responseText);
                }
            }
        }
        return false;
    }
}

</script>
</head>
<body>
<a href="hello.txt">Ajax hello.txt</a>
</body>

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