<html>
<head>
<title></title>
</head>
<body>
<div>HTML各种输入验证</div>
用户:<input id="uname" type="text" /><br />
密码:<input id="pwd" type="password" /><br>
确认密码:<input id="pwd1" type="password" /><br>
EMAIL:<input id="email" name="email" type="email" /><br>
<input id="load" value="登陆" type="button" onclick="check()" />
<script language="javascript">
window.onload = function ()
{
document.getElementById('uname').focus();
}
function check()
{
var uname=document.getElementById("uname").value;
var pwd=document.getElementById("pwd").value;
var pwd1=document.getElementById("pwd1").value;
var email=document.getElementById("email").value;
if(uname+pwd=="")
{
alert("用户名和密码不能为空");
}
else if(uname=="")
{
alert("用户名不能为空");
}
else if(pwd=="")
{
alert("密码不能为空");
}
else if(pwd1 != pwd)
{
alert("两次密码不一样");
}
//
if(email=="")
{
alert("电子邮件不能为空");
return false;
}
else
{
reg=/^([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/gi;
if(!reg.test(email))
{
alert("非法的电子邮件");
return false;
}
}
}
</script>
</body>
</html>