Catch the "Server not found" Event/Exception

Hi,
I have a simple xul app which loads a url and writes the contents to a
file. I use the "DMContentLoaded" event to trap the end of document
load as detailed below.

This works fine but when I give an invalid url like "http://icio.us",
i get a "server not found" popup which is the correct behaviour.

How do I trap this event/exception and handle it graciously in my
code?

function browserLoaded() {
// save the document to a file
}

var browser = document.getElementById("browserId");

browser.addEventListener("DMContentLoaded", browserLoaded, false);
browser.setAttribute('src', url);

Thanks,
Irfan


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