If you want to turn off your Javascript... Er, I'm using Google Chrome... So just go to the settings and click the show advance settings.. then in the privacy, click the content settings.
There'll be pop out there. Cookies, Images then Javascript. that's what you want, click manage exceptions. Add You are not allowed to view links.
Register or
Login and click the right box and hit block then ok. After that, go back here and refresh your screen.
The bats will be gone then.
I use that cause my laptop is slowing down. I haven't upgraded my laptop's memory so it's really slow. Hope that helps! I don't know in Firefox though since I uninstall my FF.