GET方式：（获取参数使用Request.QueryString）
<script type="text/javascript">
function createXMLHttpRequest() {
if (window.ActiveXObject)//判断是不是IE浏览器
return new ActiveXObject("Microsoft.XMLHTTP");
else
return new XMLHttpRequest();
}
var xmlHttpRequest;
function CheckName() {
var name = document.getElementById("userName").value;
var url = "Default2.aspx?userName=" + name;
//创建XMLHttpRequest对象
xmlHttpRequest = createXMLHttpRequest();
//设置回调函数
xmlHttpRequest.onreadystatechange = ReadyDo;
//初始化XMLHttpRequest对象
xmlHttpRequest.open("GET", url, true);
//发送请求
xmlHttpRequest.send();
}
function ReadyDo() {
if (xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200) {
var result = xmlHttpRequest.responseText;
if (result == "true") {
document.getElementById("msg").style.display = "none";
}
else {
document.getElementById("msg").style.display = "inline";
}
}
}
</script>
POST方式：（获取参数方式Request.Form）
<script type="text/javascript">
function createXMLHttpRequest() {
if (window.ActiveXObject)
return new ActiveXObject("Microsoft.XMLHTTP");
else
return new XMLHttpRequest();
}
var xmlHttpRequest;
function Login() {
var userName = document.getElementById("<%= this.txtLoginId.ClientID %>").value;
var password = document.getElementById("<%= this.txtPwd.ClientID %>").value;
//创建XMLHttpRequest对象
xmlHttpRequest = createXMLHttpRequest();
//设置回调函数
xmlHttpRequest.onreadystatechange = ReadyDo;
//初始化XMLHttpRequest对象
xmlHttpRequest.open("POST", "Default2.aspx", true);
//如果是post提交要设置请求头部
xmlHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
//发送请求
var data = "userName=" + escape(userName) + "&password=" + escape(password);
xmlHttpRequest.send(data);
}
function ReadyDo() {
if (xmlHttpRequest.readyState == 4 && xmlHttpRequest.status == 200) {
var result = xmlHttpRequest.responseText;
if (result == "true") {
alert("登录成功");
}
else {
alert("登录失败");
}
}
}
</script>