代码示例：（标识：eg_js_ajax_responsexml）
<!DOCTYPE html>
<html>
<body>
<h1>XMLHttpRequest 对象</h1>
<p id="demo"></p>
<script>
var xhttp, xmlDoc, txt, x, i;
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
xmlDoc = this.responseXML;
txt = "";
x = xmlDoc.getElementsByTagName("ARTIST");
for (i = 0; i < x.length; i++) {
txt = txt + x[i].childNodes[0].nodeValue + "<br>";
}
document.getElementById("demo").innerHTML = txt;
}
};
xhttp.open("GET", "/static/demo/xml/music_list.xml", true);
xhttp.send();
</script>
</body>
</html>
