var present;   

var future;    

var tseconds;  

var seconds;   

var minutes;

var hours;

var days;

ID=setTimeout("countdown();", 1000);



function countdown() 

{

present = new Date();

present = present.getTime() + (60000) + (12 * 60 * 60 * 1000);

future = new Date("April 24, 2012 12:30:00 PM");



tseconds = (future - present) / 1000;



days = tseconds /24/60/60;

days = Math.floor(days);

tseconds = tseconds - (days * 24 * 60 * 60);



hours = tseconds /60/60;

hours = Math.floor(hours);

tseconds = tseconds - (hours * 60 * 60);



minutes = tseconds /60;

minutes = Math.floor(minutes);

tseconds = tseconds - (minutes * 60);



seconds = tseconds;

seconds = Math.floor(seconds);



document.getElementById('days').innerText = days;  

document.getElementById('hours').innerText = hours;

document.getElementById('minutes').innerText = minutes;

document.getElementById('seconds').innerText = seconds;

ID=setTimeout("countdown();", 1000);

}