How to get "raw" href contents in JavaScript

I am trying to write a GreaseMonkey script in which I want to find all of the links that are relative links. It seemed to me that the way to do that would be to match the contents of href against `/^https?:///`. But I find that when I access the anchor's href attribute, it's always normalized or cooked into a form that contains "http". That is, if the HTML contains: ``` <a id="rel" href="/relative/link">inner</a> ``` accessing ``` document.getElementById("rel").href ``` returns ``` http://example.com/relative/link ``` How can I access the raw data in the href attribute? Alternately, is there a better way to find relative links?