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Ok! It's for Google Chrome this issue.  Safari, IE, FF, Opera work fine.


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">



<script type="text/javascript">

function changeStyle()


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

var y=(x.contentWindow || x.contentDocument);

if (y.document)






<body onload="changeStyle()">


<iframe id="myframe" src="js1.htm">

<p>Your browser does not support iframes.</p>


<br /><br />


<input type="button" onclick="changeStyle()" value="Change background color" />




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I have both files in my PC.  The console outputs Unsafe JavaScript attempt to access frame with URL file:///C:/Documents%20and%20Settings/Administrador/Escritorio/js1.htm from frame with URL file:///C:/Documents%20and%20Settings/Administrador/Escritorio/js2.htm. Domains, protocols and ports must match.


Any idea?

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One more question about this issue.  Does contentDocument() javascript method work on subdomains. 

I have this site http://www.binal.ac.pa/harias/series.htm and I load an iframe in each of this categories listed.  What I want to do with JS is to send a char via simulating a click and sending the char to the DB application.


Thanks for your comments!


And yes I'm using Chrome but now with Wamp localhost.


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