function toggleAll(area, checkbox) {
	selection = document.getElementById(area);
	checkboxes = selection.getElementsByTagName('input');
	for (var i = 0; i < (checkboxes.length) ; i++) {
		if(checkbox.checked == true) {
			checkboxes[i].checked = true;
			checkboxes[i].disabled = true;

		} else {
			checkboxes[i].checked = false;
			checkboxes[i].disabled = false;
		}
	}
}