Best Practices for <apex:panelbar>

An <apex:panelBar> component can only have <apex:panelBarItem> child components. Sometimes, though, you want to add a collection of child components. For example, you may want to add an item for each contact associated with an account. You can do this by wrapping <apex:panelBarItem> in an <apex:repeat> component, as follows:

For this page to display account data, the ID of a valid account record must be specified as a query parameter in the URL for the page. For example: https://MyDomain_login_URL/apex/myPage?id=001D000000IRosz