function simpleFindObj(name, inLayer) {
	return document[name] || (document.all && document.all[name])
		|| (document.getElementById && document.getElementById(name))
		|| (document.layers && inLayer && document.layers[inLayer].document[name]);
}

var clockIncrementMillis = 1000;
var localTime;
var clockOffset;
var clockExpirationLocal;
var clockShowsSeconds = false;
var clockTimerID = null;

function clockInit(localDateObject, serverDateObject)
{
    var origRemoteClock = parseInt(clockGetCookieData("remoteClock"));
    var origLocalClock = parseInt(clockGetCookieData("localClock"));
    var newRemoteClock = serverDateObject.getTime();
    var newLocalClock = localDateObject.getTime();
    var maxClockAge = 60 * 60 * 1000;   

    if (newRemoteClock != origRemoteClock) {
       
        document.cookie = "remoteClock=" + newRemoteClock;
        document.cookie = "localClock=" + newLocalClock;
        clockOffset = newRemoteClock - newLocalClock;
        clockExpirationLocal = newLocalClock + maxClockAge;
        localTime = newLocalClock;  
    }
    else if (origLocalClock != origLocalClock) {

        clockOffset = null;
        clockExpirationLocal = null;
    }
    else {

        clockOffset = origRemoteClock - origLocalClock;
        clockExpirationLocal = origLocalClock + maxClockAge;
        localTime = origLocalClock;

    }

    var nextDayLocal = (new Date(serverDateObject.getFullYear(),
            serverDateObject.getMonth(),
            serverDateObject.getDate() + 1)).getTime() - clockOffset;
    if (nextDayLocal < clockExpirationLocal) {
        clockExpirationLocal = nextDayLocal;
    }
}

function clockOnLoad()
{
    clockUpdate();
}

function clockOnUnload() {
    clockClearTimeout();
}

function clockClearTimeout() {
    if (clockTimerID) {
        clearTimeout(clockTimerID);
        clockTimerID = null;
    }
}

function clockToggleSeconds()
{
    clockClearTimeout();
    if (clockShowsSeconds) {
        clockShowsSeconds = false;
        clockIncrementMillis = 1000;
    }
    else {
        clockShowsSeconds = true;
        clockIncrementMillis = 1000;
    }
    clockUpdate();
}

function clockTimeString(inHours, inMinutes, inSeconds) {
    return inHours == null ? "-:--" : ((inHours == 0
                   ? "12" : (inHours <= 12 ? inHours : inHours - 12))
                + (inMinutes < 10 ? ":0" : ":") + inMinutes
                + (inSeconds < 10 ? ":0" : ":") + inSeconds 
                + (inHours < 12 ? " AM" : " PM"));
}

function clockDisplayTime(inHours, inMinutes, inSeconds) {
    
    clockWriteToDiv("ClockTime", clockTimeString(inHours, inMinutes, inSeconds));
}

function clockWriteToDiv(divName, newValue) 
{
    var divObject = simpleFindObj(divName);
    newValue = '<p>' + newValue + '<' + '/p>';
    if (divObject && divObject.innerHTML) {
        divObject.innerHTML = newValue;
    }
    else if (divObject && divObject.document) {
        divObject.document.writeln(newValue);
        divObject.document.close();
    }

}

function clockGetCookieData(label) {

    var c = document.cookie;
    if (c) {
        var labelLen = label.length, cEnd = c.length;
        while (cEnd > 0) {
            var cStart = c.lastIndexOf(';',cEnd-1) + 1;

            while (cStart < cEnd && c.charAt(cStart)==" ") cStart++;
            if (cStart + labelLen <= cEnd && c.substr(cStart,labelLen) == label) {
                if (cStart + labelLen == cEnd) {                
                    return ""; 
                }
                else if (c.charAt(cStart+labelLen) == "=") {
                   
                    return unescape(c.substring(cStart + labelLen + 1,cEnd));
                }
            }
            cEnd = cStart - 1;  
        }
    }
    return null;
}


function clockUpdate()
{
    var lastLocalTime = localTime;
    localTime = (new Date()).getTime();
    

    if (clockOffset == null) {
        clockDisplayTime(null, null, null);
    }
    else if (localTime < lastLocalTime || clockExpirationLocal < localTime) {
    
        document.cookie = 'remoteClock=-';
        document.cookie = 'localClock=-';
        location.reload();      
    }
    else {

        var serverTime = new Date(localTime + clockOffset);
        clockDisplayTime(serverTime.getHours(), serverTime.getMinutes(),
            serverTime.getSeconds());
        

        clockTimerID = setTimeout("clockUpdate()",
            clockIncrementMillis - (serverTime.getTime() % clockIncrementMillis));
    }
}