这里通过点击一个按钮，然后下面产生一段文字，而整个页面不用刷新
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>AJAX</title><script>function loadXMLDoc() {var xhr = new XMLHttpRequest();xhr.onreadystatechange=function () {if(xhr.readyState == 4 && xhr.status == 200) {//通过Ajax响应的东西异步的展示在id为hello的div中document.getElementById("myDiv").innerHTML=xhr.responseText;}};xhr.open("POST","newPage.html",true);xhr.send();}</script></head><body><div>我的第一个AJAX</div><button type="button" onclick="loadXMLDoc()">点击</button><div id="myDiv"></div></body></html>
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Title</title></head><body>hello world!</body></html>
运行结果：
