Comments on: Obscure Internet Explorer Bugs: #1 of… who knows? http://www.nickfitz.co.uk/2005/05/17/obscure-internet-explorer-bugs-1-of-who-knows/ Actively seeking a pithy tagline... Wed, 15 Oct 2008 23:57:30 +0000 http://wordpress.org/?v=2.0.3 by: zcorpan http://www.nickfitz.co.uk/2005/05/17/obscure-internet-explorer-bugs-1-of-who-knows/#comment-5 Wed, 08 Jun 2005 19:07:27 +0000 http://www.nickfitz.co.uk/2005/05/17/obscure-internet-explorer-bugs-1-of-who-knows/#comment-5 Yep, any unknown tag is treated as an empty element by IE. I tried this: <!DOCTYPE HTML><HTML><HEAD><TITLE></TITLE></HEAD><BODY><P><FOO></FOO></P></BODY></HTML> ...and then: javascript:(function(){ var elms = document.getElementsByTagName("*"), i = elms.length; while(i--){ alert(elms[i].tagName); }})() It also seems to treat the DOCTYPE as an element, with a tagName of "!". :) Yep, any unknown tag is treated as an empty element by IE. I tried this:

<!DOCTYPE HTML><HTML><HEAD><TITLE></TITLE></HEAD><BODY><P><FOO></FOO></P></BODY></HTML>

…and then:

javascript:(function(){ var elms = document.getElementsByTagName(”*”), i = elms.length; while(i–){ alert(elms[i].tagName); }})()

It also seems to treat the DOCTYPE as an element, with a tagName of “!”. :)

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