jsjac.js message sending / receiving flow

[pokal4u]

Hi,
can you explain jsjac.js sending/receiving functions flow?
how can i get user is offline/online?
some time not sending messages getting messages(attached file) in debugger (this time connection status: resume), working after 2-3 times refresh page

and if any other js errors. then jsjac connection terminated.

Thanks
Pokal4u

[rraptorr]

Information about user being online is carried via 'presence' stanzas in XMPP. See RFC6121 section 4 for detailed description: http://xmpp.org/rfcs/rfc6121.html#presence

Unfortunately, I completely don't understand the rest of your question.