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Asked: 2026-05-21T09:49:53+00:00

In IE, I can go like: var x = document.getElementById(header); alert(x.all[0].tagName); If I try

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In IE, I can go like:

var x = document.getElementById("header");

alert(x.all[0].tagName);

If I try that in Firefox, I get the error “all is undefined”.

What is the Firefox equivalent of IE’s .all property?

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1 Answer

  1. Editorial Team

    .all is a Microsoft-specific extension to the DOM, and is not supported by any other browsers (except Opera, I believe, who simulate it in order to improve compatibility with sites written for IE).

    You can use things like x.children and x.childNodes, or x.getElementById() and x.getElementsByTagName() to reference elements below the current one in the tree, depending on your usage. I suspect in this case x.children is what you’re after.

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