now = new Date(); eventDate = new Date("April 18, 2003"); msEachDay = 24 * 60 * 60 * 1000 ; function daysUntilEvent(){ daysRemaining = 0- (eventDate.getTime() - now.getTime()) / msEachDay; daysRemaining = Math.round(daysRemaining); document.write("countdown: " + daysRemaining + " days");}