today = new Date();
convention = new Date();
convention.setTime(Date.parse('Feb 24, 2010 12:00 PM EST'));

if (today.getTime() < convention.getTime()) {
	diff = convention.getTime() - today.getTime();
	diff = Math.floor(diff / (1000 * 60 * 60 *24));
	document.write('Only ' + diff + ' days until PrezCon ' + convention.getFullYear() + '!');
}
else {
	document.write('The ' + convention.getFullYear() + ' PrezCon convention has begun!');
}