var cdiv;
var tdate;

function countback() {
	if (cdiv) {
		if (!tdate) {
			tdate = new Date();
			tdate.setTime(tdate.getTime() + 3600 * 1000);		
		}

		var dnow = new Date();
		var ddiff = new Date(tdate-dnow);
		var secs = Math.floor(ddiff.valueOf()/1000);
		
		if (secs > 0 ) {
			cdiv.html(calcage(secs,60,60) + ' minutes, ' + calcage(secs,1,60) + ' seconds');
			secs--;
			setTimeout('countback()', 1000);
		} else {
			cdiv.html('Coupon Expired. Sorry');
		}
	}		
}


function calcage(secs, num1, num2) {
  s = ((Math.floor(secs/num1))%num2).toString();
  if (s.length < 2)
    s = "0" + s;
  return "<i>" + s + "</i>";
}

function startcounting(id, td) {
	if (id && td) {
		cdiv = id;
		tdate = td;
		countback();
	}
}