function update(id) {
	obj=document.getElementById('a'+id);
	var classnm = obj.className;
	if (classnm == 'expired') {obj.className = 'expiredbooked';}
	if (classnm == 'expiredbooked') {obj.className = 'expired';}
	if (classnm == 'available') {obj.className = 'booked';}
	if (classnm == 'booked') {obj.className = 'available';}
	var val = ((data.charAt(id) == '0')? '1':'0');
	var sub1 = data.substr(0, id);
	var sub2 = data.substr(id+1);
	data = sub1.concat(val, sub2);
	//alert(data);
	//alert(origdata);
}

function check(url) {
	if (data != origdata) {
		if (confirm('Save Changes before Proceeding?')) {
			submitform();
		} else {
			this.location.href = url;
		}
	} else {
		this.location.href = url;
	}
}

function submitform() {
	var formobj = document.forms['subform'];
	formobj.data.value = data;
	formobj.submit();
}