function popupSupertell(percent) {
	if (!percent) {
		var message = '';
	} else {
		var message = 'I was once ' + percent + '% likely to be taken out by a train. By sending this email to you, I have decreased those odds by half.';
	}

	var url = 'http://www.supertell.com/supertell.php?sid=0C81FAA776B3F931BF6EAF2BC6C3B3E5&mt=1&title=Operation Lifesaver - Save a Friend&message=' + message;

	stWindow = window.open(url,
			'windowECard',
			'width=750,height=450,status=yes,menubar=no,toolbar=no,scrollbars=yes,resizable=yes');
	stWindow.focus();
}