Be sure to correct all the people who are using the term “cool” for things other than relative temperature, as it was originally defined.

See also the dictionary fallacy, and again descriptivism vs prescriptivism.

Additionally, even leaving alone the div/dynamic language issue, there really isn’t a point in usage history where DHTML came without JS — believe me, I was doing it when the term first came into usage. JS was required for nearly all dynamic behavior.