Fritz Trapper wrote in post #961110:
OK, so it's no bad idea, to implement page local storage as sketched above.
I certainly wouldn't commit to saying that. All I'm saying is that it's not a "left-field" idea to have per-window client-side storage.
The HTML5 method seems to me to be the right way to manage it. But, unless you're in a unique situation where you can require IE8+ (or any of the many other browsers that support sessionStorage) it's too early it rely on it. There are still too many <=IE7 users out there to even consider this at present.