Hmm, well, I'm wondering if this could be caused by your anti-malware software. I've come across similar situations in the past (though not for several years) with similar symptoms. Basically, some anti-malware injects JavaScript into every web page and, if there is an error in this, chances are no JavaScript will work further down the page. Changing a cursor's pointer is a JavaScript function, so it might be that.
Ordinarily, I would never advise anybody to turn off their anti-malware but you might like to try it temporarily to see if that is in fact the issue.
What do you use? AVG, Avast, MSE, Norton, Kaspersky (surely not!)...