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AJAX XMLHttpRequest
tryjs_ajax_first
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<!DOCTYPE html> <html> <body> <div id="demo"> <h2>XMLHttpRequest 对象</h2> <button type="button" onclick="loadDoc()">更改内容</button> </div> <script> function loadDoc() { var xhttp = new XMLHttpRequest(); xhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { document.getElementById("demo").innerHTML = this.responseText; } }; xhttp.open("GET", "/demo/ajax_info.txt", true); xhttp.send(); } </script> </body> </html>