if (document.images) {
    var imgArray = new Array();
    imgArray[0] = new Image(60,120);
    imgArray[0].src = "images/digits/0.gif";
    imgArray[1] = new Image(60,120);
    imgArray[1].src = "images/digits/1.gif";
    imgArray[2] = new Image(60,120);
    imgArray[2].src = "images/digits/2.gif";
    imgArray[3] = new Image(60,120);
    imgArray[3].src = "images/digits/3.gif";
    imgArray[4] = new Image(60,120);
    imgArray[4].src = "images/digits/4.gif";
    imgArray[5] = new Image(60,120);
    imgArray[5].src = "images/digits/5.gif";
    imgArray[6] = new Image(60,120);
    imgArray[6].src = "images/digits/6.gif";
    imgArray[7] = new Image(60,120);
    imgArray[7].src = "images/digits/7.gif";
    imgArray[8] = new Image(60,120);
    imgArray[8].src = "images/digits/8.gif";
    imgArray[9] = new Image(60,120);
    imgArray[9].src = "images/digits/9.gif";
}

var nextYear = new Date().getYear() + 1;
nextYear += (nextYear < 1900) ? 1900 : 0;
var targetInMS = Date.UTC(2011, 10, 15, 24, 0, 0);
var oneSec = 1000;
var oneMin = 60 * oneSec;
var oneHr = 60 * oneMin;
var oneDay = 24 * oneHr;

function countDown() {
    var nowInMS = new Date().getTime();
    var diff = targetInMS - nowInMS;
    var scratchPad = diff / oneDay;
    var daysLeft = Math.floor(scratchPad);
    // hours left
    diff -= (daysLeft * oneDay);
    scratchPad = diff / oneHr;
    var hrsLeft = Math.floor(scratchPad);
    // minutes left
    diff -= (hrsLeft * oneHr);
    scratchPad = diff / oneMin;
    var minsLeft = Math.floor(scratchPad);
    // seconds left
    diff -= (minsLeft * oneMin);
    scratchPad = diff / oneSec;
    var secsLeft = Math.floor(scratchPad);
    // now adjust images
    setImages(daysLeft, hrsLeft, minsLeft, secsLeft);
}

function setImages(days, hrs, mins, secs) {
    var i;
    days = formatNum(days, 3); 
    for (i = 0; i < days.length; i++) {
        document.images["days" + i].src = imgArray[parseInt(days.charAt(i))].src;
    }
}

function formatNum(num, len) {
    var numStr = "" + num;
    while (numStr.length < len) {
        numStr = "0" + numStr;
    }
    return numStr
}