function check_location_fields()
{
	if ( !$( 'location_country_id' ).value )
		return false;
		
	if ( $( 'location_zip_cont' ).className == 'location_unit_show' && !$( 'location_zip' ).value.trim() )
		return false;
	
	if ( $( 'location_state_cont' ).className == 'location_unit_show' )
	{
		if ( !$( 'location_state_id' ).value )
			return false;
			
		if ( $( 'location_city_cont' ).className == 'location_unit_show' && !$( 'location_city_id' ).value )
			return false;
	}
	
	return true;
}