var clockLocalStartTime = new Date();

function clockInit() {
}

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 = true;
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; // get new time from server every 1hr

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 = 60000;
}
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
+ (clockShowsSeconds
? ((inSeconds < 10 ? ":0" : ":") + inSeconds) : "")
+ (inHours < 12 ? " am" : " pm"));
}

function clockDisplayTime(inHours, inMinutes, inSeconds) {

clockWriteToDiv("capa_hora", clockTimeString(inHours, inMinutes, inSeconds));
}

function clockWriteToDiv(divName, newValue) 
{
var divObject = simpleFindObj(divName);
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) == "=") {
// has "=" after label
return unescape(c.substring(cStart + labelLen + 1,cEnd));
}
}
cEnd = cStart - 1; // skip semicolon
}
}
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));
}
}