Stop trying to emulate the focus/blur event in IE, doesn't work as one might expect...

Stop trying to emulate the focus/blur event in IE, doesn't work as one might expect, anyway. Instead, implement the focusin/focusout events in all other browsers - which creates a much better parity across all browsers. Uses event capturing instead of bubbling to make it happen. Thanks to Alexander for the recommendation and to Joern Zaefferer for the original focus/blur delegation code.