function display_dealers(county_dropdown_id, dealer_dropdown_id)
{
	var county_id = document.getElementById(county_dropdown_id).value;
	var i;

	/* ----- Empty drop-down ----- */
	document.getElementById(dealer_dropdown_id).options.length = 0;
	document.getElementById(dealer_dropdown_id)[0] = new Option('All dealers', '0', true, true);

	/* ----- Add dealers to drop-down (if needed) ----- */
	if (county_id != '0')
	{
		for (i = 0; i < dealers[county_id].length; i+=2)
		{
			document.getElementById(dealer_dropdown_id)[Math.round(i/2)+1] = new Option(dealers[county_id][i+1], dealers[county_id][i], false, false);
		}
	}

	/* ----- Select the 1st model ----- */
	document.getElementById(dealer_dropdown_id).selectedIndex = 0;
}