Hal sent this to me off list. I think it is "list worthy" at least as much as pizza is:-) Unfortunate the guy writes obtusely. read it many times ,a d it will make sense. Peter >Peter, >Check out ><http://www.gglotus.org/ggtech/smith-tach/smithtach.htm>http://www.gglotus.org/ggtech/smith-tach/smithtach.htm >Hal