求ajax的实例代码？

Question

求ajax的实例代码？

Answer 1

//核心对象变量var xmlHttp;//区分浏览器创建XMLHttpRequest核心对象function create(){if(window.XMLHttpRequset){xmlHttp = new XMLHttpRequest();}else if(window.ActiveXObject){xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");}}//ajax核心执行方法（此处为提交到servlet处理后,返回纯文本）function run(){create();var value = document.getElementById("id").value;var URL = "/ajax/servlet/ajax?name="+value;xmlHttp.open("GET",URL,true);xmlHttp.onreadystatechange=callback;xmlHttp.send(null);}//回调函数function callback(){if(xmlHttp.readyState == 4){if(xmlHttp.status == 200){var v = xmlHttp.responseText;alert(v);}}}