// Prepare radiolist value which will be used in SQL statement.
// In this function, we convert the returned value into the ones that are
// stored in the database.
//
// Arguments:
// radiolist ; the integer value of radiolist parameter in the
// GetPOI request.
//
// Returns:
// radio_value ; the value that can be used to construct the right SQL
// statement.

function GetRadioValue ($radiolist) {
	// if $radiolist exists, prepare radio_value.
	if( isset( $radiolist ) ) {
	$radio_value;
		// if $radiolist == 1, return $radio_value =”sale”;
		// if $radiolist == 2, return $radio_value =”rent”;
	switch ($radiolist) {
		case ‘1’:
			$radio_value = “sale” ;
			break;
		case ‘2’:
			$radio_value = “rent” ;
			break;
		default:
		throw new Exception( “invalid radiolist value:”.$radiolist );
	} //switch
	return $radio_value;
	}//if
	else {
		throw new Exception(“radiolist parameter is not passed in GetPOI request.”);
}//else