Issue with focusSubtabById & alternative approach

We had used the onFocusSubtab function in an VF page with standard controller( overwritten for a standard object view action).

When we use the onFocusSubtab for doing some business logic it woks only with latest tab opened in the service console.

Issue: when a tab is closed and open other record from the same object, onFocusSubtab stopped working. Not only it stopped working, it also breaks service console.
Ex..

• Other tabs will start behaving abnormally, like content of other tabs will display for some other tab.
• In one case, it splits screen in half and disturbs whole service console and tabs.

Resolution: We have to use alternative approach to deal with the onFocusSubtab 

Solution: In the same place use an addEventListener for CloseTab event

	//Add a listener to handle the closing of the enclosing primary tab
	sforce.console.getEnclosingPrimaryTabId(function (result) {
	var onEnclosingPrimaryTabClose = function (CallbackRes) {
	alert('The enclosing primary tab is about to be closed. Tab ID: ' + CallbackRes.id + ', Object ID: ' + (CallbackRes.objectId ? CallbackRes.objectId : 'not available'));
	};
	if (result.id) {
	sforce.console.addEventListener(sforce.console.ConsoleEvent.CLOSE_TAB, onEnclosingPrimaryTabClose, { tabId : result.id });
	} else {
	alert('Could not find an enclosing primary TAB!');
	}
	});

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