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Yes, the Moreover code is basically compat with IE only. It has problems of one form or another with other major browsers. I don't think they even test it for Opera or Non-windows versions of Netscape. When js calls cause browsers headaches, you'll get some fun stuff in the logs from the bogus requests. Those that have active sites with moreover or some multimedia affiliate code know...they know.
NN4.08 - OK
IE5.5 - OK
NN6.0 - OK
Opera 5.02 - OK
When I see the 404 errors in my logs, it has always been a spider, skipping the <SCRIPT>/Comment mechanism, and trying to load:
<A HREF='"+global_article[counter].url+"' >
Of course the browser has replaced this when it sees the script tag, but the spider is just scanning for <a href... anyway.
I don't have all the browsers, and there could be some problems that I'm not aware of with the ones I don't have, but I'll bet it's usually some kind of spider producing these errors.
But really, the js code is in comments, part of original HTML. So if somebody did get a link like suet is talking about, they're also looking at all of the js code.
So whatever browser showed a link like that would have to be really old. Lynx browsers will skip that stuff..
I'm just saying that my logs show only robots trying to take those kind of links. They're just scanning for <a href.....>blah</a>
If I'm correct, it looks like you could have a hidden link inside comments for these spiders and they'll try to follow.