title: $("#container").css("left") - what is the expected behaviour?
body: <p><code>$("#container").css("left")</code> should return the left positioning of an element. If the css for the element says <code>left: 20px;</code> the jQuery should return <code>20px</code>. What should happen for an element that is positioned relative, but not given a CSS <code>left</code> position?</p>
  
  <p>I've noticed that Chrome and Firefox handle this differently. Firefox returns <code>0px</code>, Chrome returns <code>auto</code>. Here's a <a href="http://jsfiddle.net/tR8QY/1/">JSFiddle</a> to provide a demo of the behaviour. Please view it in Firefox and Chrome.</p>
  
  <p>Is this expected behaviour? To me it looks like Chrome and FF give the element a different default position (<code>0px</code>/<code>auto</code>). Is there a standard that applies in this case, that one of the browsers is violating, and if so, which one is correct?</p>