<!DOCTYPE html>
<html lang="en">
<head>
<title>JavaScript E-Mail Validation</title>
</head>
<body>
<script type="text/javascript">
function validate_email(field_condition, alert_message) {
with(field_condition) {
apos = value.indexOf("@");
dotpos = value.lastIndexOf(".");
if (apos < 1 || dotpos - apos < 2) {
alert(alert_message);
return false;
} else {
return true;
}
}
}
function validate_form(form) {
with(form) {
if (validate_email(email, "This E-Mail Address is not a valid!") == false) {
email.focus();
return false;
}
}
}
</script>
<form action="form_submit_message.php" onsubmit="return validate_form(this);" method="post">
Enter Your Email:
<input type="text" name="email" size="35"/>
<input type="submit" value="Submit"/>
</form>
</body>
</html>
