<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script language="javascript" type="text/javascript">
var xmlHttp = false;
try{
xml Http = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e){
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e2) {
xmlHttp = false;
}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
function UpdatePage()
{
if (xmlHttp.readyState == 4) {
var response = xmlHttp.responseText;
document.getElementById("UserName").value = response;
}
}
function ValidateUserName()
{
alert("aaa");
var userName = document.getElementById("UserName").value;
if (userName == null && userName == "") return;
var url = "Default2.aspx?useranem="+userName;
xmlHttp.open("GET", url, true);
xmlHttp.onreadystatechange = UpdatePage;
xmlHttp.send(null);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="UserName" type="text" onchange="ValidateUserName()"/>
<input id="Button1" type="button" value="button" />
</div>
</form>
</body>
</html>
