Event handler for Window.
code or function on the occurance of a DragDrop event. This is when an
object, such as a shortcut or file, is dragged and dropped into the browser
window. If the event handler returns true, the browser will attempt to
load the dropped item into its window, and if false the drag and drop
process is cancelled.
The onDragDrop event handler uses the following Event
data - this property returns the URLs of any dropped objects as
an Array of Strings.
type - this property indicates the type of event.
target - this property indicates the object to which the event
was originally sent.
screenX - the cursor location when the click event occurs.
screenY - the cursor location when the click event occurs.
modifiers - lists the modifier keys (shift, alt, ctrl, etc.) held
down when the click event occurs.