the behaviour of top: auto; bamboozles me

Question

Hi I\'m really confused about some basics with absolute positioning.

Answer 1

Using auto for top (or left) tells the browser to position an element in the exact same way it would if the element had 'position: fixed'.

This jsfiddle demonstrates what I mean: http://jsfiddle.net/kUmKW/

Try changing the value of left or top from auto to see what happens.