There's something wrong with your Javascript, this doesn't happen to me.
Have you recently installed any plugins that may be interfering? Try disabling them to see if it fixes this issue. Does it happen in every browser? Try logging in with a different browser (maybe IE) and see if this is still happening or not. If it's only your primary browser, and you haven't downloaded any new plugins, then maybe check to see if you may have disabled JS by accident. (
Chrome: Menu > Settings > Show advanced settings > Content settings > Allow all sites to run JavaScript) If that's not the problem, then try clearing your cache. (
Chrome: Menu > Tools > Clear browsing data > Empty cache) If the problem is still present, then you may have to
reset your browser or
re-install. Remember to
not click "Also delete your browsing data" in order to keep all your information and settings!
It's like reporting any post but in this case it is the first.