Change a Visualforce Page by Using the Salesforce Console Integration Toolkit

<apex:page standardController="Case">

 <apex:includeScript value="/support/console/63.0/integration.js"/>
 <script type="text/javascript">
        function openPrimaryTab() {
            sforce.console.openPrimaryTab(undefined, 
               'https://www.example.com', true, 'example');
        }
        
        //The callback function that openSubtab will call once it has the ID for its primary tab
        var callOpenSubtab=function callOpenSubtab(result) {
            sforce.console.openSubtab(result.id, 
               'https://www.example.com', true, 'example');
        };
        
        function openSubtab() {
            sforce.console.getEnclosingPrimaryTabId(callOpenSubtab);
        }

        //Sets the title of the current tab to "Example"
        function setTitle() {
            sforce.console.setTabTitle('Example');
        }
        
        //The callback function that closeTab will call once it has the ID for its tab
        var callCloseTab= function callCloseTab(result) {
            sforce.console.closeTab(result.id);
        }
        
        function closeTab() {
            sforce.console.getEnclosingTabId(callCloseTab);
        }
  </script>

   <A HREF="#" onClick="openPrimaryTab();return false">Open A Primary Tab</A> 
   <p/><A HREF="#" onClick="openSubtab();return false">Open A Subtab</A> 
   <p/><A HREF="#" onClick="setTitle();return false">Set Title to Example</A> 
   <p/><A HREF="#" onClick="closeTab();return false">Close This Tab</A> 

</apex:page>