HTML5 Drag and Drop

• Make an Element Draggable

  <img draggable="true">
  

• What to Drag - ondragstart and setData()

• Where to Drop - ondragover

  By default, data/elements cannot be dropped in other elements. To allow a drop, we must prevent the default handling of the element.

  event.preventDefault()
  

JS实现拖拽

原文：http://my.oschina.net/guesswhoamI/blog/413408