点击运行
<!DOCTYPE html> <html> <body> <h1>XMLHttpRequest 对象</h1> <button type="button" onclick="loadDoc()">请求数据</button> <p>单击该按钮几次以查看时间是否已更改，或文件是否已缓存。</p> <p id="demo"></p> <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", "/zy/demo/demo_get.php?t=" + Math.random(), true); xhttp.send(); } </script> </body> </html>
运行结果
