document.observe('dom:loaded', initMultiLocations);

function initMultiLocations()
{
	$$('.box_location').each(function (obj) {
		$(obj).observe('click', select_deselect);
	});
}

function select_deselect(evt)
{
	var val = Event.element(evt).value;
	if(Event.element(evt).checked)
	{
		$$('.r_' + val).each(function (s) {
			$(s).checked = true;
		});
	}
	else
	{
		$$('.r_' + val).each(function (s) {
			$(s).checked = false;
		});
	}
}