1 main frame - has 1 onunload handler(s)
3 ALERT: window.onpageshow, target = [object HTMLDocument], persisted = false
4 ALERT: window.onpagehide, target = [object HTMLDocument], persisted = false
5 main frame "pageshow/pagehide" - has 1 onunload handler(s)
7 ALERT: window.onpageshow, target = [object HTMLDocument], persisted = false
8 Test pageshow/pagehide event behavior when navigating back to an uncached page.