实例之数据验证

来源：互联网发布：淘宝网t恤女编辑：程序博客网时间：2024/05/20 18:41

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>自动校验的表单</title>
<style type="text/css">

</style>
<script language="javascript" src="jquery.min.js"></script>
<script language="javascript">
$(function(){
$("#UserResult").ajaxSend(function(){
  //定义全局函数
  $(this).html("<font style='background:#990000; color:#FFFFFF;'>loading... </font>");
});
});
function showResult(sText){
var oSpan = document.getElementById("UserResult");
oSpan.innerHTML = sText;
if(sText.indexOf("already exists") >= 0)
  //如果用户名已被占用
  oSpan.style.color = "red";
else
  oSpan.style.color = "black";
}
function startCheck(oInput){
//首先判断是否有输入，没有输入直接返回，并提示
if(!oInput.value){
  oInput.focus();  //聚焦到用户名的输入框
  $("#UserResult").html("User cannot be empty.");
  return;
}

$.get("14-9.aspx",{user:oInput.value.toLowerCase()},
  //用jQuery来获取异步数据
  function(data){
    showResult(decodeURI(data));
  }
);
}
</script>
</head>
<body>
<form name="register">
<table cellpadding="5" cellspacing="0" border="0">
<tr><td>用户名:</td><td><input type="text" onblur="startCheck(this)" name="User"></td> <td><span id="UserResult"></span></td> </tr>
<tr><td>输入密码:</td><td><input type="password" name="passwd1"></td> <td></td> </tr>
    <tr><td>确认密码:</td><td><input type="password" name="passwd2"></td> <td></td> </tr>
<tr>
  <td colspan="2" align="center">
  <input type="submit" value="注册">
        <input type="reset" value="重置">
  </td> <td></td>
</tr>
</table>
</form>
</body>
</html>

<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" %>
<%@ Import Namespace="System.Data" %>
<%
Response.CacheControl = "no-cache";
Response.AddHeader("Pragma","no-cache");

for(int i=0;i<100000000;i++); //为了测试返回速度慢
if(Request["user"]=="isaac")
Response.Write("Sorry, " + Request["user"] + " already exists.");
else
Response.Write(Request["user"]+" is ok.");
%>