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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="regest.aspx.cs" Inherits="regest" %>
<!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></title>
<script language="javascript" type="text/javascript">
function checkName() {
var xmlhttp;
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
}
else {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
var name = document.getElementById("userName").value;
if (name == null) {
alert("用户名为空");
return;
}
var url = "Default.aspx?name="+escape(name);
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4) {
document.getElementById('span1').innerHTML = xmlhttp.responseText;
alert("用户名为空!");
}
}
xmlhttp.open("POST", url, true);
xmlhttp.send(null);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td align="center">新用户注册</td>
</tr>
<tr>
<td>
<input type="text" name="username" id="username" onchange="checkName()"; />
</td>
<td>
<span id="span1"></span>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string name = Request["name"];
if (name == "sss")
{
Response.Write("测试成功");
}
}
}