bmp image with how to dos command to convert the JPG?

I remember the original order is a conversion under the dos picture format xxx *.bmp *.jpg in front of xxx not remember what the order.To know tell me about it? If there is a batch.Bat of the best papers also give me a Thank you, the

jasldkfjlksadjf; lasdjf; lksfj; klsadjfklafjkl; asdf ..you can not only change the name, ..rename *.jpg .bmp suffix directly into the JPG.troublesome to do so, download a software ACDSEE, on the inside with bulk conversion function, it is full of