<html>
<head>
<title>用户信息注册</title>
<style>
.Item{
font-size:8px;
}
</style>
</head>
<body align="center" >
<h2 >用户注册表单</h2>
<form method="post" >
<p>用 户 名 :<input type="text" name="user" size="12" maxlength="20" required="required" placeholder="不超过20个字">
</p>
<p>昵 称 :<input type="text" name="username" size="12" maxlength="20" required="required" placeholder="不超过10个字">
</p>
<p>登陆密码:<input type="password" name="password" size="12" minlength="8" required="required" placeholder="至少为8位">
</p>
<p>性别:
<input type="radio" name="sex"/>男
<input type="radio" name="sex"/> 女</p>
<p> 联系电话:
<input type="tel" name="tel" required="Required"></p>
<p>电子邮件:<input type="text" name="email" required="required"></p>
<p>联系地址:<input type="text" name="address" required="required"></p>
<p class="Item"><input type="radio" name="item" required="requied" style="width:8px;height:8px;">同意注册项目服务条款</p>
<input type="submit" value="注册">
<input type="reset" value="清除">
</form>
</body>
</html>JS判断