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QuestionAccessing remote window HTML elements via getElementsByTagName [modified] Pin
Art K17-Aug-09 11:26
Art K17-Aug-09 11:26 
Hello, I am trying to access HTML DOM elements in a remote window using JavaScript and getElementsByTagName but the resultant arrays are undefined.

<pre>
var remoteWin = window.open(URL,'rmtWindow');
remoteTags = remoteWin.document.getElementsByTagName("<tag>");
localTags = self.document.getElementsByTagName("<tag>");
</pre>

This works fine for localTags but not for remoteTags.
Am I not referencing the remote window correctly?

Also there seems to be some inconsistency in returned values:

<pre>
<a href="href URI string" param="hvalue"><img src="img URI string" param="ivalue"></a>
getElementsByTagName("a") returns the full "href URI string" string but getElementsByTagName("img") returns "[object HTMLImageElement]"
</pre>

I want to retrieve and manipulate the actual text strings of these elements, i.e., I want to access "img URI string", "hvalue" and "ivalue". I assume that I need to access properties of "[object HTMLImageElement]" to obtain the strings, including the strings for the optional parameter strings, but where or how do I find the definition of these properties?

Is there a way to associate the returned value for each embedded "img" element with its encapsulating "a" element? It is highly unlikely that the array indicies will match.

[Edit] Is the "img" element a child of the "a" element? If so I can associate them that way.

Thank you for your help, Art

[Edit] Firefox did not complain about this code, just left the values "undefined".
Opera [9.6], throws an exception and says "Security error: attempted to read protected variable".
Yet neither gives me any trouble when I write to a remote window. What's going on???

modified on Tuesday, August 18, 2009 4:56 AM

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