The new tab was below and the users didn’t always know it was there, so I wanted to nudge them in the right direction by setting focus on the tab.
Microsoft Dynamics CRM 2013: Client API Enhancement
It’s important to check the CRM SDK XRM documentation because each release of CRM adds and removes functions.
Xrm.Page.ui control (client-side reference)
The CRM SDK documentation shows the functionality available for each release by selecting the CRM version in the drop down at the top of the page.
When you select a different version it will change the methods available. This enables you to see what functionality is available for each version and what new functionality has been added.