function newsletter_check_email()
{
	return $('#newsletter_email').val().length > 0;
}

function newsletter_check_submit()
{
	if(newsletter_check_email())
		document.forms['newsletter_id'].submit();
	else
		$('#newsletter_email').addClass('missingfield');
}

function newsletter_email_change()
{
	if(newsletter_check_email())
	{
		$('#newsletter_email').removeClass('missingfield');
	}
	else
	{
		$('#newsletter_email').addClass('missingfield');
	}
}