php用户注册页面利用js进行表单验证

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<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>用户注册 - 当当网</title>
<link href="../css/login.css" rel="stylesheet" type="text/css" />
<link href="../css/page_bottom.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="../js/jquery-1.7.1.js"></script>
<script type="text/javascript">
var flag = {
"email":false,
"nickname":false,
"password":false,
"verify":false
};

$(function(){
$("#txtEmail").blur(function () {
var email=$(this).val();
//alert(email);
if(email==""){
$("#email\\.info").html("Email地址不能为空");
return;
}
var pattern=/\b(^['_A-Za-z0-9-]+(\.['_A-Za-z0-9-]+)*@([A-Za-z0-9-])+(\.[A-Za-z0-9-]+)*((\.[A-Za-z0-9]{2,})|(\.[A-Za-z0-9]{2,}\.[A-Za-z0-9]{2,}))$)\b/;
if(!pattern.test(email)){
$("#email\\.info").html("Email格式不正确");
return;
}
$.get("check_email.php?email="+email,null,
function(data){
$("#email\\.info").html(data);
if (data=="可以注册") {
flag.email=true;
}
}
);
});
$("#txtNickName").blur(function () {
var nickname=$(this).val();
if(nickname==""){
$("#name\\.info").html("昵称不能为空");
return;
}
var pattern = /\b(^['A-Za-z0-9]{4,20}$)\b/;
if (!pattern.test(nickname)) {
$("#name\\.info").html("昵称格式不正确");
return;
}else{
$("#name\\.info").html("昵称格式正确");
flag.nickname=true;
return;
}
});
$("#txtPassword").blur(function () {
var password=$(this).val();
if (password=="") {
$("#password\\.info").html("密码不能为空");
return;
}
var pattern = /\b(^['A-Za-z0-9]{4,20}$)\b/;
if (!pattern.test(password)) {
$("#password\\.info").html("密码格式不正确");
return;
}else{
$("#password\\.info").html("密码格式正确");
//flag.password=true;
return;
}
});
$("#txtRepeatPass").blur(function () {
var password1=$(this).val();
if (password1=="") {
$("#password1\\.info").html("密码不能为空");
return;
}
var pattern = /\b(^['A-Za-z0-9]{4,20}$)\b/;
if (!pattern.test(password1)) {
$("#password1\\.info").html("密码格式不正确");
return;
}else if(password1!=$("#txtPassword").val()){
$("#password1\\.info").html("两次输入的密码不一致");
return;
}else{
$("#password1\\.info").html("重复密码正确");
flag.password=true;
return;
}
});
$("#txtVerifyCode").blur(function () {
var verify=$(this).val();
if(verify==""){
$("#number\\.info").html("验证码不能为空");
return;
}
$.post("./verify/check.php",{verify:verify},
function(data){
$("#number\\.info").html(data);
if (data=="验证成功") {
flag.verify=true;
}
}
);
})
$("#f").submit(function(){
var ok = flag.email&&flag.password&&flag.verify&&flag.nickname;
if(ok==false){
alert("表单项正在检测或存在错误");
history.back();
return false;
}
return true;
});
})
</script>
</head>
<body>
<?php include("../common/head.php"); ?>
<div class="login_step">
注册步骤:<span class="red_bold">1.填写信息</span> > 2.验证邮箱 > 3.注册成功
</div>
<div class="fill_message">
<form name="ctl00" method="post" action="save_reg.php" id="f">
<h2>以下均为必填项</h2>
<table class="tab_login" >
<tr>
<td valign="top" class="w1">请填写您的Email地址:</td>
<td>
<input name="email" type="text" id="txtEmail" class="text_input"/>
<div class="text_left" id="emailValidMsg">
<p>请填写有效的Email地址。</p>
<span id="email.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">设置您在当当网的昵称:</td>
<td>
<input name="nickname" type="text" id="txtNickName" class="text_input" />
<div class="text_left" id="nickNameValidMsg">
<p>由小写英文字母、中文、数字组成,长度4-20个字符,一个汉字为两个字符。</p>
<span id="name.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">设置密码:</td>
<td>
<input name="password" type="password" id="txtPassword" class="text_input" />
<div class="text_left" id="passwordValidMsg">
<p>您的密码可以由大小写英文字母、数字组成,长度6-20位。</p>
<span id="password.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">再次输入您设置的密码:</td>
<td>
<input name="password1" type="password" id="txtRepeatPass" class="text_input"/>
<div class="text_left" id="repeatPassValidMsg">
<span id="password1.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">验证码:</td>
<td>
<img class="yzm_img" id='imgVcode' src='./verify/verify.php' style="cursor:pointer" border='0' onclick="document.getElementById('imgVcode').src='./verify/verify.php?t='+Math.random()"/>
<input name="number" type="text" id="txtVerifyCode" class="yzm_input"/>
<div class="text_left t1">
<p class="t1">
<span id="vcodeValidMsg">请输入图片中的四个字母。</span>
<a href="#" style="cursor:pointer"
onclick="document.getElementById('imgVcode').src='./verify/verify.php?t='+Math.random()">
看不清楚?换个图片
</a>
<br />
<span id="number.info" style="color:red"></span>
</p>
</div>
</td>
</tr>
</table>

<div class="login_in">
<input id="btnClientRegister" class="button_1" name="submit" type="submit" value="注 册"/>
</div>
</form>
</div>
<?php include("../common/foot.php"); ?>
</body>
</html>