today = new Date();

BigDay = new Date("June 8, 2010");
msPerDay = 24 * 60 * 60 * 1000;
timeLeft = (BigDay.getTime() - today.getTime());

var num = timeLeft / msPerDay

if(num % 1 < .50 && num % 1 > 0){
    e_daysLeft = Math.round(timeLeft / msPerDay) + 1;  //round if not calculating hours, minutes
}else{
    e_daysLeft = Math.round(timeLeft / msPerDay)
}

daysLeft = Math.floor(e_daysLeft);
/*e_hrsLeft = (e_daysLeft - daysLeft) * 24;
hrsLeft = Math.floor(e_hrsLeft);
minsLeft = Math.floor((e_hrsLeft - hrsLeft) * 60);*/
document.getElementById("daysLeft").value = daysLeft;