Is there a site anywhere that documents all standard JavaScript DOM methods, events and properties and when they were introduced into the various browsers? I've used W3Schools' XML DOM Object Reference, but it's badly dated, it only tracks IE, Firefox, Opera and W3C, it's missing heaps of newer 'standard' methods, plus I'm certain I ran into something there that was wrong, but I can't remember what it was.
Half the time I write something now, I'm never certain that the methods my code relies on have the coverage I expect and I don't have the resources to test in every version of every browser out there.