Is JavaScript single threaded? If not, how do I get synchronized access to shared data?

Question

I have a web page with DIVs with a mouseover handler that is intended to show a pop-up information bubble. I don\'t want more than one info bubble

Answer 1

It could be that the display isn't refreshing fast enough. Depending on the JS library you are using, you might be able to put a tiny delay on the pop-up "show" effect.