_getStyle = function(el, prop) {
    var value = _getComputedStyle(el, null).getPropertyValue(prop);
    if (prop === "cursor") {
      if (!value || value === "auto") {
        if (el.nodeName === "A") {
          return "pointer";
        }
      }
    }
    return value;
  }
Attempt to interpret the element's CSS styling. If `prop` is `"cursor"`,
then we assume that it should be a hand ("pointer") cursor if the element
is an anchor element ("a" tag).

@returns The computed style property.
@private