CSS Anchors Shim

css_anchors.js

(function(){
var hash = decodeURIComponent((location.href.match(/#(.*)$/) || [])[1]);
if(hash){
    var el = document.querySelector(hash), t = 0;

    do { t += el.offsetTop; }
    while (el.offsetParent && (el = el.offsetParent));

    window.scrollTo(0, t);
}
})();

css_anchors.user.js

// ==UserScript==
// @name        CSS Anchors
// @description Shim for CSS Anchors
// @version     0.01
// @author      jacob@krawaller.se
// @license     MIT License
// @namespace   http://blog.krawaller.se
// @include     http://*
// ==/UserScript==

(function(){
var hash, el, t = 0;
if (window.pageYOffset == 0 && (hash = (location.href.match(/#(.*)$/) || [])[1]) && (el = document.querySelector(hash)) ) {
    do { t += el.offsetTop; }
    while (el.offsetParent && (el = el.offsetParent));
    window.scrollTo(0, t);
}
})();

As a bookmarklet: javascript:(function(){var%20s%20=%20document.createElement('script');%20s.src%20=%20'http://gist.github.com/raw/464296/030e1af507c248af508dd817d44c42691890abd1/css_anchors.js';%20document.getElementsByTagName('head')[0].appendChild(s);})()

In Chrome, try clicking the raw link of css_anchors.user.js to install as a plugin. Then hit a page like http://en.wikipedia.org/wiki/Aral#a[href="/wiki/North_Aral_Sea"] to see it in action.