Safari 5 Extension: How can I detect when a window's current tab has changed?

Question

I have a Safari 5 extension that contains a toolbar. Whenever the current tab changes, that toolbar should be updated. I would like to do something like this from my bar\'s

Answer 1

That's the event you are looking for. I'm not sure, but i think is a new addition to the extensions api. You can put in global.html or in the popover.html

safari.application.addEventListener("activate", activateHandler, true);

function activateHandler(event) {
    safari.application.activeBrowserWindow.activeTab.page.dispatchMessage('someId', false);
}