來自：http://www.cnblogs.com/fuchifeng/archive/2008/11/25/1340913.html
以下AJAX post 傳值
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script language="javascript">
function saveUserInfo()
{
//獲取接受返回信息層
var msg = document.getElementById("msg");
//獲取表單對(duì)象和用戶信息值
var f = document.user_info;
var userName = f.user_name.value;
var userAge = f.user_age.value;
var userSex = f.user_sex.value;
//接收表單的URL地址
var url = "/ajax_output.php";
//需要POST的值，把每個(gè)變量都通過&來聯(lián)接
var postStr = "user_name="+ userName +"&user_age="+ userAge +"&user_sex="+ userSex;
//實(shí)例化Ajax
//var ajax = InitAjax();
var ajax = false;
//開始初始化XMLHttpRequest對(duì)象
if(window.XMLHttpRequest) { //Mozilla 瀏覽器
ajax = new XMLHttpRequest();
if (ajax.overrideMimeType) {//設(shè)置MiME類別
ajax.overrideMimeType("text/xml");
}
}
else if (window.ActiveXObject) { // IE瀏覽器
try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!ajax) { // 異常，創(chuàng)建對(duì)象實(shí)例失敗
window.alert("不能創(chuàng)建XMLHttpRequest對(duì)象實(shí)例.");
return false;
}
//通過Post方式打開連接
ajax.open("POST", url, true);
//定義傳輸?shù)奈募﨟TTP頭信息
ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
//發(fā)送POST數(shù)據(jù)
ajax.send(postStr);
//獲取執(zhí)行狀態(tài)
ajax.onreadystatechange = function() {
//如果執(zhí)行狀態(tài)成功，那么就把返回信息寫到指定的層里
if (ajax.readyState == 4 && ajax.status == 200) {
msg.innerHTML = ajax.responseText;
}
}
}
</script>
<body >
<div id="msg"></div>
<form name="user_info" method="post" action="">
姓名：<input type="text" name="user_name" /><br />
年齡：<input type="text" name="user_age" /><br />
性別：<input type="text" name="user_sex" /><br />
<input type="button" value="提交表單" onClick="saveUserInfo()">
</form>
</body>
以下是AJAX get傳值
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script language="javascript">
function saveUserInfo()
{
//獲取接受返回信息層
var msg = document.getElementById("msg");
//獲取表單對(duì)象和用戶信息值
var f = document.user_info;
var userName = f.user_name.value;
var userAge = f.user_age.value;
var userSex = f.user_sex.value;
//接收表單的URL地址
var url = "/ajax_output.php? user_name="+ userName +"&user_age="+ userAge +"&user_sex="+ userSex";
//實(shí)例化Ajax
//var ajax = InitAjax();
var ajax = false;
//開始初始化XMLHttpRequest對(duì)象
if(window.XMLHttpRequest) { //Mozilla 瀏覽器
ajax = new XMLHttpRequest();
if (ajax.overrideMimeType) {//設(shè)置MiME類別
ajax.overrideMimeType("text/xml");
}
}
else if (window.ActiveXObject) { // IE瀏覽器
try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!ajax) { // 異常，創(chuàng)建對(duì)象實(shí)例失敗
window.alert("不能創(chuàng)建XMLHttpRequest對(duì)象實(shí)例.");
return false;
}
//通過Post方式打開連接
ajax.open("GET", url, true);
//發(fā)送GET數(shù)據(jù),已經(jīng)在URL中賦了值所以send那里只要加個(gè)空參.
ajax.send(null);
//獲取執(zhí)行狀態(tài)
ajax.onreadystatechange = function() {
//如果執(zhí)行狀態(tài)成功，那么就把返回信息寫到指定的層里
if (ajax.readyState == 4 && ajax.status == 200) {
msg.innerHTML = ajax.responseText;
}
}
}
</script>
<body >
<div id="msg"></div>
<form name="user_info" method="post" action="">
姓名：<input type="text" name="user_name" /><br />
年齡：<input type="text" name="user_age" /><br />
性別：<input type="text" name="user_sex" /><br />
<input type="button" value="提交表單" onClick="saveUserInfo()">
</form>
</body>
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