add dragable div
fix div <live chat>
change new_window -> div
merge dev into test&fix
Merge branch 'test&fix' into 721_live_chat_session
fix chat <jc & html>
add comments & fix time_online
fix chat css
merge dev into 721
Merge branch 'dev' into 721_live_chat_session
change hide script
Merge pull request #163 from is-valid/721_live_chat_session

721 live chat session