I don't have the sources right now, but I once watched (not attended!) a presentation that talked about how JS was initially intended to be a language more like Lisp or Smalltalk, but was changed into an OO language to appease the heavy marketing at the time.
You're right I was half asleep when I wrote the previous comment, I am very sorry. I meant a C(Java?)-like language. Which I am aware has nothing to do with OO, just syntax style.