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From: FAQ server on 9 Apr 2010 19:00
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FAQ Topic - Why doesn't the global variable "divId" always
refer to the element with id="divId"?
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Microsoft introduced a shortcut that can be used to reference
elements which include an ` id ` attribute where the
` id ` becomes a globally-accessible property. Some browsers reproduce
this behavior. Some, most notably Gecko-based browsers (Netscape and Mozilla),
do so only in "quirks" mode. The best approach is the ` document.getElementById `
method, which is part of the W3C DOM standard and implemented
in modern browsers (including IE from version 5.0). So an
element with ` id="foo" ` can be referenced
with:-

var el = document.getElementById("foo");

Note: make sure not to use the same ` id ` twice in the same document
and do not give an element a ` name ` that matches an ` id `
of another in the same document or it will trigger bugs in MSIE <= 7 with
` document.getElementsByName ` and ` document.getElementById `.

https://developer.mozilla.org/en/Using_Web_Standards_in_your_Web_Pages/Using_the_W3C_DOM#Accessing_Elements_with_the_W3C_DOM

http://jibbering.com/faq/faq_notes/faq_notes.html#FAQN4_41


The complete comp.lang.javascript FAQ is at
http://jibbering.com/faq/

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