function reserve(itemId, stamp){	
	var td = document.getElementById('td_' + itemId + '_' + stamp);
	var chbox = document.getElementById('toReserve_' + itemId + '_' + stamp);
	
	
	if(chbox.checked) {
		/*td.class = chbox.value;	*/
		td.className = chbox.value;	
	} else {
		/*td.class = 'selected';	*/
		td.className = 'selected';
	}

	chbox.checked = !chbox.checked;
	return false;
}