How to Hide / Show a Tab in CRM 2011 using Javascript OR Toggle visibility of Tab in CRM 2011

Code snippet to show or hide a tab on the entity form in CRM 2011 using javascript.

To show a tab:

Xrm.Page.ui.tabs.get("yourtabname").setVisible(true);

To hide a tab:

Xrm.Page.ui.tabs.get("yourtabname").setVisible(false);