Function NullProtoObject

test/form/samples/supports-core-js/_expected.js:1712–1724

()

	// avoid IE GC bug
	var activeXDocument;
	var NullProtoObject = function () {
	  try {
	    activeXDocument = new ActiveXObject('htmlfile');
	  } catch (error) { /* ignore */ }
	  NullProtoObject = typeof document != 'undefined'
	    ? document.domain && activeXDocument
	      ? NullProtoObjectViaActiveX(activeXDocument) // old IE
	      : NullProtoObjectViaIFrame()
	    : NullProtoObjectViaActiveX(activeXDocument); // WSH
	  var length = enumBugKeys.length;
	  while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];
	  return NullProtoObject();
	};

	hiddenKeys[IE_PROTO] = true;