// ==UserScript==
// @name           Highlight Much-Favourited Metafilter Comments
// @namespace      http://rephrase.net/box/user-js/
// @include        http://metafilter.com/*
// @include        http://www.metafilter.com/*
// ==/UserScript==

(function(){

// Highlight comments favourited more than this many times:
var threshold = 9;

var exp = '//div[@class="comments"]//a[contains(@href, "/favorited/")]';
var a = document.evaluate(exp, document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
var match;
for(var elm = null, i = 0; (elm = a.snapshotItem(i)); i++) {
    if (match = elm.firstChild.nodeValue.match(/(\d+) favorites?/)) {
        if (parseInt(match[1], 10) > threshold) {
            elm.parentNode.parentNode.style.marginLeft = "65px";
            elm.parentNode.parentNode.style.padding = "10px";
            
            elm.parentNode.parentNode.style.backgroundColor = "#1177AA";
        }
    }
}

}());