<html>
<head>
<script language="javascript">
function validation()
{
if(!verif(document.form.email.value)) {
alert("Votre email est invalide !");
document.form.email.focus();
return false;
}
}
//fonction qui vérifie la validiter d'un mail
function verif(email) { // Email valide ?
var arobase = email.indexOf("@")
var point = email.lastIndexOf(".")
if((arobase < 3)||(point + 2 > email.length)
||(point < arobase+3)) return false
return true
}
</script>
</head>
<body>
<form name="form" method="post" action="index.asp" onsubmit="return validation();">
<input type="text" name="email" size="33">
</form>
</body>
</html>