OK: here's a javascript puzzle

[struggle4progress]

Some website javascript has stopped working for me on some (perhaps all?) sites: website clicks requiring javascript don't do squat

Using OSX 10.6.6 (up to date)

I tried several different browsers: Chrome (up to date), Firefox4beta (up to date), Safari (up to date), Opera (up to date)

Same problem with all. I double-checked Preferences for the various browsers to see whether (if applicable) javascript was enabled: whenever there was an applicable checkbox, it was appropriately checked

Ran verify permissions from disk utility. There were some incorrect permissions on java virtual machine files, so I repaired. Didn't help

This online javascript tester tells me "JavaScript IS WORKING in your web browser" when I drop by (using Chrome, say): http://www.javatester.org/javascript.html

Example of the problem:

I search Supreme Court dockets and get 35 hits for Obama: http://www.supremecourt.gov/search.aspx?Search=obama&type=Supreme-Court=Dockets
7 hits show on the first page
There are navigation buttons (like "Next >") atop the displayed list
I can see the navigation buttons are javascript -- but they don't do squat

Yall got any ideas?