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What’s the difference between document[id] and document.all[id]

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Dec 13.2007

What’s the difference between document[id] and document.all[id]

[CODE]<script type=”text/javascript”>
var d,n,x;
d=document;
n=’txt’;
d.txt=’text’;
x=d[n];
d.write(x);
d.write(“<br />”);
x=’null’;
x=d.all[n];
d.write(x);
</script>[/CODE]

I can acess d.txt with x=d[n], but I fail to do so with x=d.all[n].
I suppose that any property in document can be accessed with d.all[prop_name]. What’s wrong?
Can anyone help? I am a newbie in javascript.?
Many thanks!

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JavaScript

4 Comments(s) ↴

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@gil_davisDec 13.2007 — The "document.all" structure is a non-W3C implementation used in Internet Explorer (and I think Opera) and should be avoided.

If you are using a browser other than IE, "d.all" would not exist unless you create it.
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@KorDec 13.2007 — I could tell you which is the [I]resemblance[/I] between document.all[id] and document[id]. Both are [I]wrong[/I] in modern javascript.

Except the form's elements, all the other elements can bear only an [B]id[/B], not a [B]name[/B].

To refer an element upon it's id, the correct syntax is:

document.[B]getElementById([/B][I]id[/I][B])[/B]
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@felgallDec 14.2007 — The difference is that one of those invalid commands is slightly shorter than the other and involves deleting fewer wrong characters when replacing it with the correct command.
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@aaron792authorDec 14.2007 — Thank you all!

I got it!

Actually I saw such codes in some real world webpages.

Thanks for all your replies, I won't use them in my coding.

FORZA JUVE!
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