var cdiv;
var tdate = new Date();

tdate.setTime(tdate.getTime() + 86400 * 1000);

function countback() {
	var dnow = new Date();
	var ddiff = new Date(tdate-dnow);
	var secs = Math.floor(ddiff.valueOf()/1000);

	if (cdiv && tdate) {		
		if (secs > 0 ) {
			mysecs  = secs;
			hours   = Math.floor(mysecs / 3600);
			mysecs  = mysecs % 3600;
			minutes = Math.floor(mysecs / 60);
			mysecs  = mysecs % 60;

			dstr = ((hours > 0) ? hours + ' hours, ' : '') +
				   ((minutes > 0) ? minutes + ' minutes, ' : '' ) +
				   mysecs + ' seconds.';
			cdiv.html(dstr);
			secs--;
			setTimeout('countback()', 1000);
		} else {
			cdiv.html('Coupon Expired. Sorry');
		}
	}		
}

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