No, javascript itself shouldn't, but what about people browsing without javascript? For whatever reason, they have an obscure browser that doesn't support it, or they have it turned off, or...

I've been to a lot of sites, and I'm sure most of you have been too, that break horribly without javascript being enabled. There is absolutely no graceful degradation, you either have it on, or you don't use that site. I've seen some where it breaks something so obviously necessary as the ability to log in, and others where it breaks little things, that chances are the site was better off without anyways.

I like AJAX, I think it's nifty, and can be enormously handy in some cases. But anything I use javascript for, I want to make sure there's something in place to handle the situation if there is no javascript.
-m