for example, I want to know the H-Bonds in protein 1a2p, I go to

http://bioportal.weizmann.ac.il/oca-bin/csu?PDB_ID=1a2p

I found there's four sheet strands for each chain.
I click on "Strand 1" on "A sheet" (residue 96-99)
I'll go to this page
from this page, if there's a "+" sign under HB colume, I know there's a H-Bond.