Ajax+asp.net实现用户登陆实现用户登陆
以用户登录为例练习ajax的使用方法
login.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript">
var obj = createobj();
function login(name, pwd)
{
var urlstr = "http://localhost:14248/server.aspx?username=" + name + "&password=" + pwd;
obj.open("get", urlstr, true);
obj.onreadystatechange = dowork;
obj.send();
}
function dowork()
{
if (obj.readyState == 4)
{
if (obj.status == 200)
{
document.getElementById("msg").innerText = obj.responseText;
}
}
}
//创建对象
function createobj()
{
var xmlHttp = null;
try {
//非IE浏览器
xmlHttp = new XMLHttpRequest();
}
catch (e)
{ //IE浏览器
try{
xmlHttp = new ActiveXObject("Msxml2.HTTP");
}
catch (e)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
</script>
</head>
<body>
<table>
<tr>
<td align="center" colspan="2">登录</td>
</tr>
<tr>
<td>用户名:</td>
<td><input type="text" id="username" name="username" /></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="password" id="password" name="password" /></td>
</tr>
<tr>