AJAX原始用法

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Ajax</title>
<mce:script type="text/javascript"><!--

var xmlHttp;

function createXMLHttpRequest(){
if(window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} else {
xmlHttp = new XMLHttpRequest();
}
}

function sendServer() {

var name = document.getElementById("myText").value;

var v = encodeURIComponent(name)

//alert(name);
//alert(v);

//var time = new Date().getTime();

createXMLHttpRequest();
//xmlHttp.open("GET","ajax.do?name="+v+"&date="+time,true);
xmlHttp.open("GET","ajax.do?name="+v,true);
//xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.onreadystatechange = callback;
xmlHttp.send();
}

function callback(){
if(xmlHttp.readyState == 4){
document.getElementById("pic").style.display = "none";
if(xmlHttp.status == 200){
var text = xmlHttp.responseText;
//alert(text);
document.getElementById("cc").innerHTML = text;
} else {
alert(xmlHttp.status);
}
} else {
document.getElementById("pic").style.display = "block";
}
}


//
--></mce:script>
</head>

<body>
<input type="text" id="myText"/>
<div id="pic" style="display:none" mce_style="display:none">
<img alt="" src="images/loading.gif" mce_src="images/loading.gif"/>
</div>
<div>
<input type="button" value="Ajax Send" onclick="sendServer()"/>
</div>
<div id="cc"></div>
</body>
</html>

转载于:https://www.cnblogs.com/archie2010/archive/2010/10/26/1945164.html

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