function postEmail()
{
	Element.hide('message');
	emailAddress = $('signup_email').value;
	new Ajax.Updater('message', '/signup.php?email=' + emailAddress, {asynchronous:false});
	if($('success') || $('duplicate'))
	{
		Effect.Appear('message');
		Effect.Fade('form');
	}
	else
	{Effect.Appear('message');}
}