.add method in IE breaks when pass an HTMLCollection

[[email protected]…]

When form.elements is passed to .add() in IE it has a a nodeType of 1, so add() treats it as a single DOM element not a collection of DOM elements. When it treats it as a single DOM element .add() wraps the collection in an array. The end result is an array containng one item which is an array like object (HTMLCollection). See it in action, ​http://jsfiddle.net/w7qNc/2/.

[[email protected]…]

Minor correction, IE8. I haven't tested earlier versions of IE. IE9 seems to be OK.

[gibson042]

Support for array-like handling of form.elements was ​dropped last year for lack of a reliable way to differentiate it from form. See #6867 & #2114.