function countdown_clock(year, month, day, hour, minute)
{
//I chose a div as the container for the timer, but
//it can be an input tag inside a form, or anything
//who's displayed content can be changed through
//client-side scripting.
html_code = '
';
document.write(html_code);
Today = new Date();
Todays_Year = Today.getFullYear() - 2000;
Todays_Month = Today.getMonth();
putenv('TZ=America/New_York');
$date = getDate();
$second = $date["seconds"];
$minute = $date["minutes"];
$hour = $date["hours"];
$day = $date["mday"];
$month = $date["mon"];
$month_name = $date["month"];
$year = $date["year"];
?>
//Computes the time difference between the client computer and the server.
Server_Date = (new Date(-2000, , ,
, , )).getTime();
Todays_Date = (new Date(Todays_Year, Todays_Month, Today.getDate(),
Today.getHours(), Today.getMinutes(), Today.getSeconds())).getTime();
countdown(year, month, day, hour, minute, (Todays_Date - Server_Date));
}
function countdown(year, month, day, hour, minute, time_difference)
{
Today = new Date();
Todays_Year = Today.getFullYear() - 2000;
Todays_Month = Today.getMonth();
//Convert today's date and the target date into miliseconds.
Todays_Date = (new Date(Todays_Year, Todays_Month, Today.getDate(),
Today.getHours(), Today.getMinutes(), Today.getSeconds())).getTime();
Target_Date = (new Date(year, month, day, hour, minute, 00)).getTime();
//Find their difference, and convert that into seconds.
//Taking into account the time differential between the client computer and the server.
Time_Left = Math.round((Target_Date - Todays_Date + time_difference) / 1000);
if(Time_Left < 0)
Time_Left = 0;
days = Math.floor(Time_Left / (60 * 60 * 24));
Time_Left %= (60 * 60 * 24);
hours = Math.floor(Time_Left / (60 * 60));
Time_Left %= (60 * 60);
minutes = Math.floor(Time_Left / 60);
Time_Left %= 60;
seconds = Time_Left;
dps = 's'; hps = 's'; mps = 's'; sps = 's';
//ps is short for plural suffix.
if(days == 1) dps ='';
if(hours == 1) hps ='';
if(minutes == 1) mps ='';
if(seconds == 1) sps ='';
document.all.countdown.innerHTML = days + ' day' + dps + ' ';
document.all.countdown.innerHTML += hours + ' hour' + hps + ' ';
document.all.countdown.innerHTML += minutes + ' minute' + mps + ' and ';
document.all.countdown.innerHTML += seconds + ' second' + sps;
//Recursive call, keeps the clock ticking.
setTimeout('countdown(' + year + ',' + month + ',' + day + ',' + hour + ',' + minute + ',' +
time_difference + ');', 1000);
}