change method for calculating tz offset from browser to server.
change method for calculating tz offset from browser to server.

torkelsson/ganglia-web,luckypoem/ganglia-web,ganglia/ganglia-web,luckypoem/ganglia-web,akkakks/ganglia-web,torkelsson/ganglia-web,akkakks/ganglia-web,torkelsson/ganglia-web,torkelsson/ganglia-web,ganglia/ganglia-web,akkakks/ganglia-web,akkakks/ganglia-web,akkakks/ganglia-web,luckypoem/ganglia-web,ganglia/ganglia-web,luckypoem/ganglia-web,ganglia/ganglia-web,ganglia/ganglia-web,torkelsson/ganglia-web,luckypoem/ganglia-web