Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. It's just different version but it shouldn't matter much. That's why it's best to keep the example really simple. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. And there are hundreds of cells. Why do small African island nations perform better than African continental nations, considering democracy and human development? i dont want to use dialog..just any box with few contents,.any suggesion for that. it should append #mmt on body and mouseout it then it should remove #mmt. Description: Attach a handler to the event for all elements which match the current selector, now and in the future. .mouseenter() | jQuery API Documentation The mouseleave event is added to the