404 Detection In JavaScript?

Dec 23, 2010

In my JavaScript I'm trying to redirect to third party page. It can open a page either in a new window or inside a frame depends on a user settings. Something like this:

if (newWindow)
{
window.open(url, targer);
}
else
{
theFrame = url;
}

What I want to do is to display my custom page in case a third party site is down or page is unavailable. Basically in case of 404 error.

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