```
$('#someDiv').hover 
  (function(){
    (this).css({'background-color': 'black'});
  }, 
  function(){
     (this).css({'background-color': 'red'});
  }
);

```

Every time I have mouseover (or out) on this `div`, Chrome console gives me back the error in the title. I thought that `div` objects have a `css()` method, and I find this situation really confusing.