x
 
<!DOCTYPE html>
<html>
<body>
<h1>XMLHttpRequest 对象</h1>
<button type="button" onclick="loadDoc()">请求数据</button>
<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", "/demo/demo_get2.asp?fname=Bill&lname=Gates", true);
  xhttp.send();
}
</script>
 
</body>
</html>