function isEmailAddress(string) {
return /^[^@]+@[^.]+(\.[^.]+)+$/.test(string);
}

function validate(form) {
var controls = form.elements,
emailAddress = controls['email'].value;

if (!isEmailAddress(emailAddress)) {
alert('Please enter your email address.');
return false;
}
if (emailAddress != controls['emailconfirm'].value) {
alert('You may have mistyped your email address.'
+ ' Please check both fields carefully and try again.');
return false;
}
}



if (obja.value==objb.value) {}
else {alert("The email fields aren't the same!!")}