// *****************************************************
//
// *****************************************************
public String substr( String key, int start, int len ) {

	return str_substr( get( key ), start, len );

}
public String str_substr( String value, int start, int len ) {

	if ( start+len > str_len( value ) ) {
		return value.substring( start, str_len( value ) );
	}
	else {
		return value.substring( start, start+len );
	}

}