If you do not have internet access from the system you use to access the vSphere Web Client, you can download and deploy a local copy of the online Help.
By default, vSphere Web Client accesses online Help on the Web. This allows the client to access the most up-to-date version of the Help content.
If you download and deploy Help locally, the local copy is not updated when new Help is published to the Web. If you deploy local Help, check the download location periodically for updates.
For instructions for downloading and deploying vSphere Web Client online Help locally, see http://kb.vmware.com/kb/2030344.