added hide and show divs for dual use by eco site, including customized examples; added hidden inventory_no input; some other reformatting (drafted through 23.5.11)
added hide and show divs for dual use by eco site, including customized examples; added hidden inventory_no input; some other reformatting (drafted through 23.5.11)

paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new