日期:2014-05-16 浏览次数:20613 次
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ajax.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>javascript的Ajax操作2</title> <meta http-equiv="pragma" content="no-cache"/> <meta http-equiv="cache-control" content="no-cache"/> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"/> <meta name="author" content="Jarg Yee <yeshaoting@gmail.com>" /> <script type="text/javascript"> var xmlHttpRequest; //用来装入XMLHttpRequest对象 function Ajax() { xmlHttpRequest = createRequestObject(); xmlHttpRequest.open("get", "ajax.php", true); xmlHttpRequest.onreadystatechange = requestCallBack; xmlHttpRequest.send(); } /** 请求回调函数 */ function requestCallBack() { /* 0: 请求未初始化 1: 服务器连接已建立 2: 请求已接收 3: 请求处理中 4: 请求已完成,且响应已就绪 */ switch(xmlHttpRequest.readyState) { case 0: showMessage("请求未初始化");break; case 1: showMessage("服务器连接已建立");break; case 2: showMessage("请求已接收");break; case 3: showMessage("请求处理中");break; case 4: showMessage("请求已完成,且响应已就绪"); if(xmlHttpRequest.status == 200) showMessage(xmlHttpRequest.responseText); break; } } /** 显示XMLHttpRequest当前状态信息 */ function showMessage(str) { var msg = document.getElementById("msg"); msg.innerHTML = msg.innerHTML + "<br/>" + str; } /** XMLHttpRequest对象 */ function createRequestObject() { var xmlHttpRequest; if(window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlHttpRequest = new XMLHttpRequest(); } else if(window.ActiveXObject) {// code for IE6, IE5 xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP"); } return xmlHttpRequest; } </script> </head> <body> <input type="button" value="Ajax提交" onclick="Ajax();" /> <div id="msg">Ajax提交过程:</div> </body> </html>
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ajax.php
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<?php //header("content-Type: text/html; charset=gb2312"); print "Ajax异步请求内容:ajax内容"; ?>?
效果:
Ajax提交过程:
请求已接收
请求处理中
请求已完成,且响应已就绪
Ajax异步请求内容:ajax内容
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