<html><head>
<meta http-equiv="Content-type" content="text/html; charset=gb2312">
<title>E-mail</title>
<style type="text/css">
td,p,li,select,input,textarea {font-size:12px}
</style>
<script language="Javascript">
function check()
{
if(document.register.email.value.length!=0)
{
if (document.register.email.value.charAt(0)=="." ||
document.register.email.value.charAt(0)=="@"||
document.register.email.value.indexOf('@', 0) == -1 ||
document.register.email.value.indexOf('.', 0) == -1 ||
document.register.email.value.lastIndexOf("@")
==document.register.email.value.length-1 ||
document.register.email.value.lastIndexOf(".")
==document.register.email.value.length-1)
{
alert("Email的格式不正確!");
document.register.email.focus();
return false;
}
}
else
{
alert("Email的不能为空!");
document.register.email.focus();
return false;
}
return false;
}
</script>
</head>
<body bgcolor=#ffffff topmargin=5 marginheight=5>
<center>
<form name="register" method="POST" action onSubmit="return check();">
<p align="center">
Email:<input type="text" name="email" size="20">
<input type="submit" value="提交" name="B1">
<input type="reset" value="重填" name="B2">
</p>
</form> </center>
</body></html>
<meta http-equiv="Content-type" content="text/html; charset=gb2312">
<title>E-mail</title>
<style type="text/css">
td,p,li,select,input,textarea {font-size:12px}
</style>
<script language="Javascript">
function check()
{
if(document.register.email.value.length!=0)
{
if (document.register.email.value.charAt(0)=="." ||
document.register.email.value.charAt(0)=="@"||
document.register.email.value.indexOf('@', 0) == -1 ||
document.register.email.value.indexOf('.', 0) == -1 ||
document.register.email.value.lastIndexOf("@")
==document.register.email.value.length-1 ||
document.register.email.value.lastIndexOf(".")
==document.register.email.value.length-1)
{
alert("Email的格式不正確!");
document.register.email.focus();
return false;
}
}
else
{
alert("Email的不能为空!");
document.register.email.focus();
return false;
}
return false;
}
</script>
</head>
<body bgcolor=#ffffff topmargin=5 marginheight=5>
<center>
<form name="register" method="POST" action onSubmit="return check();">
<p align="center">
Email:<input type="text" name="email" size="20">
<input type="submit" value="提交" name="B1">
<input type="reset" value="重填" name="B2">
</p>
</form> </center>
</body></html>
{
alert('email不正确');
}