function form_submit()
{
  var make = document.copart_cars.make.value;
  var start_year = document.copart_cars.year1.value;
  var end_year = document.copart_cars.year2.value;

  if (make == 999)
  {
    alert('Please select a make.');
    return;
  }

  if (start_year > end_year)
  {
    alert('End Year must be later than Start Year.');
    return;
  }

  document.copart_cars.submit();
}

function form_submit_advanced(){
	var start_year = document.copart_cars_adv.year1.value;
	var end_year = document.copart_cars_adv.year2.value;

	if (start_year > end_year){
		alert('End Year must be later than Start Year.');
    	return;
  	}

/*
	for (var i=1; i < document.copart_cars_adv.location[].length; i++){
		if (document.copart_cars_adv.location[i].checked){
			document.copart_cars_adv.location[0].checked = false;
		}
	}
	for (var i=1; i < document.copart_cars_adv.title_type.length; i++){
		if (document.copart_cars_adv.title_type[i].checked){
			document.copart_cars_adv.title_type[0].checked = false;
		}
	}
	for (var i=1; i < document.copart_cars_adv.loss_type.length; i++){
		if (document.copart_cars_adv.loss_type[i].checked){
			document.copart_cars_adv.loss_type[0].checked = false;
		}
	}
	for (var i=1; i < document.copart_cars_adv.damage_code.length; i++){
		if (document.copart_cars_adv.damage_code[i].checked){
			document.copart_cars_adv.daamge_code[0].checked = false;
		}
	}
*/
  document.copart_cars_adv.submit();
}