function countdown_clock(year, month, day, hour, minute, format)
{
    //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 = '<div id="countdown"></div>';
    
    document.write(html_code);
    //alert("dr gd");
    
    //alert(document.getElementById('countdown').innerHTML);
    
    countdown(year, month, day, hour, minute, format);                
}
         
function countdown(year, month, day, hour, minute, format)
{
    Today = new Date();
    Todays_Year = Today.getFullYear() - 2000;
    Todays_Month = Today.getMonth();                  
    
    //Convert both 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 - 1, day, hour, minute, 00)).getTime();                  
    
    //Find their difference, and convert that into seconds.                  
    Time_Left = Math.round((Target_Date - Todays_Date) / 1000);
    
    if(Time_Left < 0)
    Time_Left = 0;    

    switch(format)
    {
        case 0:
            //The simplest way to display the time left.
            document.all.countdown.innerHTML = Time_Left + ' seconds';
            break;
        case 1:
            //More datailed.
            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 = ''; hps = ''; mps = ''; sps = '';
            //ps is short for plural suffix.
            if(days < 10) dps ='0';
            if(hours < 10) hps ='0';
            if(minutes < 10) mps ='0';
            if(seconds < 10) sps ='0';
            
            document.getElementById('countdown').innerHTML = "" + dps + days + '&nbsp;&nbsp;&nbsp;:&nbsp;&nbsp;';
            document.getElementById('countdown').innerHTML += hps + hours + '&nbsp;&nbsp;:&nbsp;&nbsp;';
            document.getElementById('countdown').innerHTML += mps + minutes + '&nbsp;&nbsp;&nbsp;:&nbsp;&nbsp;';
            document.getElementById('countdown').innerHTML += sps + seconds;
            break;
        default: 
            document.all.countdown.innerHTML = Time_Left + ' seconds';
    }
    //Recursive call, keeps the clock ticking.
    setTimeout('countdown(' + year + ',' + month + ',' + day + ',' + hour + ',' + minute + ',' + format + ');', 1000);
}