function isinstr(arg, token, casesensitive)
	{
	// November 9, 1999 - Code Dynamics (c) - Byron J. Curlee
	// Returns True if 'token' is within 'arg'.

	if (casesensitive == true)
		{
		if (arg.indexOf(token, 0) > -1)
			{
			return true;
			}
		}
	else
		{
		var upperarg = arg.toUpperCase();
		if (upperarg.indexOf(token.toUpperCase(), 0) > -1)
			{
			return true;
			}
		}
	return false;
	}