function trim ( string ) {
	var i, numFirstChar = -1, numLastChar = -1;
	
	for ( i = 0; i < string.length; i ++ ) {
		if ( string.substring ( i, i + 1 ) != ' ' ) {
			numFirstChar = i;
			break;
		}
	}
	
	if ( numFirstChar == -1 )
		return "";
	
	for ( i = string.length; i >= 0; i -- ) {
		if ( string.substring ( i - 1, i ) != ' ' ) {
			numLastChar = i;
			break;
		}
	}
	
	return string.substring ( numFirstChar, numLastChar );
}