function focusNode(node) {
	  // IE8 can throw "Can't move focus to the control because it is invisible,
	  // not enabled, or of a type that does not accept the focus." for all kinds of
	  // reasons that are too expensive and fragile to test.
	  try {
	    node.focus();
	  } catch (e) {}
	}
@param {DOMElement} node input/textarea to focus