Trying determinate DOM Element by simple check
isElement = SomeThing instanceof Element
works in main document, but not on (all?) nodes in iframe.
Example output (Google Chrome): (mdiv is DIV in main document, idiv is DIV in iframe)
OMGWTF
ok: mdiv instanceof Element ... true ... [object HTMLDivElement]
ok: mdiv instanceof Object ... true ... [object HTMLDivElement]
ko: idiv instanceof Element ... false ... [object HTMLDivElement]
KO : idiv instanceof Object ... false ... [object HTMLDivElement]
There are different javascript implementations for main document and for iframe documents ???
Please explain me what's wrong.
Example: (http://www.sbmintegral.sk/GITHUB/OMGWTF/obalka.xhtml)
Code: obalka.xhtml (main document)
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Obalka</title>
</head>
<body>
<div id="auto_filled_commands_container">
MAIN div id="auto_filled_commands_container"<br/>
<iframe id="auto_filled_commands_iframe" src='dopis.xhtml' style="width:98%;height:98%;"/>
</div>
<div>
<textarea id="OMGWTF" style="width:700px;height:200px">
mdiv = document.getElementById("auto_filled_commands_container");
ifram = document.getElementById("auto_filled_commands_iframe");
idiv = ifram.contentDocument.getElementById('auto_filled_commands');
OMGWTF = "OMGWTF
"
+"ok: mdiv instanceof Element ... "+(mdiv instanceof Element)+" ... "+mdiv+"
"
+"ok: mdiv instanceof Object ... "+(mdiv instanceof Object)+" ... "+mdiv+"
"
+"ko: idiv instanceof Element ... "+(idiv instanceof Element)+" ... "+idiv+"
"
+"KO : idiv instanceof Object ... "+(idiv instanceof Object)+" ... "+idiv+"
"
;
document.getElementById('result_txta').value = OMGWTF;
</textarea>
<br/><input type="button" value="Eval code in upper textarea (to bypass possible developer tools error)" onclick="
eval(document.getElementById('OMGWTF').value);
"/><b>(2.)</b><br/>
<textarea id="result_txta" style="width:700px;height:100px">
</textarea>
</div>
</body>
</html>
Code: Dopis.xhtml (inner frame document)
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Dopis</title>
</head>
<body>
<div id="auto_filled_commands">
IFRAME div id="auto_filled_commands"<br/>
<div id="afc_formular">
IFRAME div id="afc_formular"<br/>
<input id="cmnd" type="text" value="input id='cmnd'" />
<br/><input type="button" value="Click to get browser userAgent" onclick="
var preEl = this.ownerDocument.getElementById('navUserAgent');
var cdataEl = preEl.firstChild || preEl; /* IE don't know CDATA ?! */
cdataEl.textContent=navigator.userAgent;
"/><b>(1.)</b>
<pre id="navUserAgent"><![CDATA[
]]></pre>
</div>
</div>
</body>
</html>
Results image (in IE, Chrome, Firefox, Opera) 
(source: sbmintegral.sk)
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