var fields = $H({
	'address_line_1'	: 'billing_address_line_1',
	'address_line_2'	: 'billing_address_line_2',
	'city'						: 'billing_city',
	'state'						: 'billing_state',
	'zip'							: 'billing_zip',
	'Field3916726'		: 'billing_country'
});
if ($F(this) == 'on') {
	// set billing info equal to personal info
	fields.each(function(row) {
		$(row[1]).setValue($F(row[0]));
	});
} else {
	// clear billing information
	fields.values().map(function(el) {
		$(el).setValue('');
	});
}