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AJAX

<html>
    <head>
        <script>
            function loadXMLDoc() {
                var xmlhttp;
                if (window.XMLHttpRequest) {
                    // code for IE7+, Firefox, Chrome, Opera, Safari
                    xmlhttp = new XMLHttpRequest();
                } else {
                    // code for IE6, IE5
                    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                }
                xmlhttp.onreadystatechange = function() {
                    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                        document.getElementById("myDiv").innerHTML = xmlhttp.responseText;
                    }
                }
                xmlhttp.open("GET", "/try/ajax/ajax_info.txt", true);
                xmlhttp.send();
            }
        </script>
    </head>
    
    <body>
        <div id="myDiv">
            <h2>
                使用 AJAX 修改该文本内容
            </h2>
        </div>
        <button type="button" onclick="loadXMLDoc()">
            修改内容
        </button>
    </body>
</html>

 

AJAX