HTMLAllCollection
typeof document.all = undefined
equal to undefined = true
equal to null = true
strictly equal to undefined = false
strictly equal to null = false
is an html collection = true
length = 9
out of range (9)  = undefined
out of range (-1) = undefined
item #0 = [object HTMLHtmlElement], id = '', name = 'undefined'
item #1 = [object HTMLHeadElement], id = '', name = 'undefined'
item #2 = [object HTMLBodyElement], id = '', name = 'undefined'
item #3 = [object HTMLFormElement], id = '', name = ''
item #4 = [object HTMLInputElement], id = 'formcontrol', name = 'one'
item #5 = [object HTMLInputElement], id = 'formcontrol', name = 'two'
item #6 = [object HTMLScriptElement], id = '', name = 'undefined'
item #7 = [object HTMLScriptElement], id = '', name = 'undefined'
item #8 = [object HTMLPreElement], id = 'out', name = 'undefined'
From good string index = [object HTMLInputElement], name = one
From bad string index = undefined
[object HTMLInputElement], name one
[object HTMLInputElement], name two
undefined
[object HTMLCollection], length = 2
first = [object HTMLInputElement]
second = [object HTMLInputElement]
namedItem('one') = [object HTMLInputElement]
namedItem('1') = null
namedItem('not in list') = null
item() = null
item('1') = [object HTMLHeadElement]
namedItem(2) = [object HTMLBodyElement]
