Code:
<div id="win" onclick="alert (win.nodeName);">win</div>
<div id="window" onclick="alert (window.nodeName);">window</div>
<div id="document" onclick="alert (document.nodeName);">document</div>
<div id="win" onclick="alert (win.nodeName);">win</div>
<div id="window" onclick="alert (window.nodeName);">window</div>
<div id="document" onclick="alert (document.nodeName);">document</div>
... provereno u IE, FF i Operi - alert (win.nodeName) ne generiše grešku već uredno vraća "DIV" ukazujući da browseri gledaju kroz prste.
Koristim FireBug na FF i lepo mi javlja "Element referenced by ID/NAME in the global scope. Use W3C standard document.getElementById() instead", ali je referenciranje ipak učinjeno.
:-)