Thanks for finding my invisible link - I'll learn to preview every time one day...

With Firefox, I get a little "i" in a circle that sometimes turns red if there is a script error. Clicking it opens a JavaScript console. I can't remember if this is part of a standard Windows (it is on my version of linux) Firefox 1.5 install or whether, like the DOM inspector, I had to do something like a "custom install" to get it. (And yes, once in a blue moon, I've needed these things).

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Like you, I try to avoid sites that make me nervous.