Here's the countdown. It restarts the countdown the day after the event, I am just wondering if there is a way to display a message on the date of the event instead of " -1 "

 today = new Date();
     thismon = today.getMonth();
     thisday = today.getDate();
     thisyr = today.getFullYear();
if (thismon == 9 && thisday > 31)
 {
 thisyr = ++thisyr;
 BigDay = new Date("October 31, "+thisyr);
 }
else
 {
 BigDay = new Date("October 31, "+thisyr);
 }
        msPerDay = 24 * 60 * 60 * 1000;
        timeLeft = (BigDay.getTime() - today.getTime());
        e_daysLeft = 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.write("" + daysLeft + " days til Halloween!");