javascr ipt的拖动条，由各纵样式，事例齐全

本人写的一个javascr ipt元素可拖动代码，供大家学习，因为是练习的，所以不会写的太好，但新手门学习下应该不成问题.-I wrote a javascr ipt element draggable code for everyone to learn, because in practice, so do not write very good, but under the learning of the novice doors should not be a problem.