offset
offset() ⇒ object
offset(coordinates) ⇒ self [v1.0]
offset(function(index, oldOffset){ ... }) ⇒ self [v1.0]
Get position of the element in the document. Returns an object with properties:
top, left, width and height.
When given an object with properties left and top, use those values to
position each element in the collection relative to the document.