function GroupReplace( 
	strMatchingString, // The entire string matched.
	strFirstLetter,    // First group from RegExp.
	strSecondLetter    // Second group from RegExp.
	){
	// Instead of doing any random letter stuff like the
	// previous examples, we will just place brackets
	// around each of the groups to demonstrate the 
	// regular expression grouping. 
	return( "[" + strFirstLetter + "][" + strSecondLetter + "]" );
}