onBeforeDrag

fires before the mouse button is pressed and the cursor is moved over a draggable item

context	object	the drag-n-drop context
native_event	Event	an HTML event object

boolean

returning false will prevent dragging of the element

Example

$$("editor").attachEvent("onBeforeDrag", function(context, native_event){
    // handler logic
});

The drag-and-drop context can have the following properties:

• from - the source object
• to - the target object
• source - the ID of the dragged item
• target - the ID of the drop target, null for dropping on empty space
• start - the ID from which drag-n-drop was started.

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