function toggle_delivery(a) {
	var hide0 = document.getElementById('shopping_chart_price_normal');
	var show0 = document.getElementById('shopping_chart_price_alt');
	var show1 = document.getElementById('shopping_chart_delivery');
	if (hide0) hide0.style.display = a?'none':'inline';
	if (show0) show0.style.display = a?'inline':'none';
	if (show1) show1.style.display = a?'table-row':'none';
}
function smart_countdown(a) {
	var countdown = document.getElementById('countdown');
	if (countdown) {
		if (a<=0) {
			location.reload(true);
		}
		var h = Math.floor(a/3600);
		var m = Math.floor(a/60) % 60;
		var s = a % 60;
		countdown.innerHTML = h+':'+((m<10)?'0':'')+m+':'+((s<10)?'0':'')+s;
		a--;
		setTimeout('smart_countdown('+a+')',1000)
	}
}