// Doesn't let the two cheboxes unchecked, checking the other when the last is unchecked

function check_i_p_validity(last_clicked) {
	if (!document.getElementById('show_individuals').checked && !document.getElementById('show_professionals').checked) {
		if(last_clicked == 'show_individuals') {
			document.getElementById('show_professionals').checked = true;
		}
		else if(last_clicked == 'show_professionals') {
			document.getElementById('show_individuals').checked = true;
		}
		else {
			document.getElementById('show_individuals').checked = true;
			document.getElementById('show_professionals').checked = true;
		}
	}
}