Question posted by: acw
(Guest)
on
July 2nd, 2008 05:05 PM
I am trying to understand how IE handles automatic tag variables.
I know that IE will create a global variable each time it finds a tag
with its name or id attribute set. If you have more than one tag with
the same name or id (yes this is bad) on a page then that global
variable goes from being a tag reference to being a collection of
references.
In most cases if you remove the duplicate tag the global var becomes a
tag reference again. Other times it remains a collection but with only
one element.
Getting completely away from using the automatic variables is not an
option. So, I am trying to understand how the variables are handled by
IE. Does anyone know what determines whether the global variable is
reverted to a tag reference or left as a collection when the duplicate
tags are removed from the page?
================================================== ==========
For example, if we start with
..
<div id="container1"></div>
<div id="container2"></div>
..
then do ...
..
container1.innerHTML = "<span id='sometext'>some text</span>"
....
container2.innerHTML = "<span id='sometext'>some more text</span>"
..
The global var sometext is a collection with two elements.
If we do the following
container2.innerHTML = ""
The global var sometext is usually pointing to the first span. Other
times is a collection and sometext[0] points to the first span.
TIA!
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