Tampermonkey stackexchange reputation display

// ==UserScript==
// @name         stackexchange reputation display
// @namespace    stackexchange
// @version      0.1.6
// @description  obtain user's rating
// @author       omegastripes
// @include      http://stackoverflow.com/*
// @include      http://meta.stackoverflow.com/*
// @include      http://superuser.com/*
// @include      http://meta.superuser.com/*
// @include      http://stackexchange.com/*
// @include      http://meta.stackexchange.com/*
// @include      http://*.stackexchange.com/*
// @include      http://ux.stackexchange.com/
// @run-at       document-end
// @grant        none
// ==/UserScript==

if (!String.prototype.includes) {
    String.prototype.includes = function (arg) {
        return !!~this.indexOf(arg);
    };
}
//console.log(String.prototype.includes);

if (!Math.log10) {
    Math.log10 = function (arg) {
        return Math.log(arg) / Math.LN10;
    };
}
//console.log(Math.log10);

var ancNodes = document.getElementsByTagName('a');
//var l = ancNodes.length;
//var h = ancNodes[0].href;
//var p = ancNodes[0].pathname;

var usrNodes = [];
var reg = /users\/\d+\/.+/i;
for (var i = 0; i < ancNodes.length; i++) {
    if (reg.test(ancNodes[i].pathname) && ancNodes[i].search === '') {
        usrNodes.push(ancNodes[i]);
        //console.log('url added: ' + ancNodes[i].href);
    }
}

var myUrl = getMyAccUrl();
//console.log('my link : ' + myUrl);

for (var i in usrNodes) {
    var usrNode = usrNodes[i];
    var usrHref = usrNode.href;
    var usrUrl;
    //console.log('pelt: ' + usrNode.pathname + ' | ' + usrNode.parentNode.tagName + ' (' + usrNode.parentNode.className + ') | ' + usrNode.parentNode.parentNode.tagName + ' (' + usrNode.parentNode.parentNode.className + ')');
    if (usrNode.parentNode.id == 'tabs') continue;
    //console.log(usrNode);
    if (usrNode.parentNode.className.includes('avatar')) continue;
    if (usrNode.className.includes('topbar')) continue;
    if (usrNode.className.includes('icon-help')) continue;
    if (usrHref == myUrl) {
        usrUrl = usrHref + '?tab=profile';
    } else {
        usrUrl = usrHref;
    }
    //console.log('get rep by url: ' + usrUrl);
    putRepToNode(usrNode, usrUrl, makeup);
}

function putRepToNode(node, url, show) {
    var xhr = new XMLHttpRequest();
    //console.log(xhr);
    xhr.onreadystatechange = function() {
        if (xhr.readyState==4 && xhr.status==200) {
            //console.log('xhr ready');
            var res = xhr.responseText;
            var tmp = res.split('<div class="reputation" title="reputation">', 2);
            var tmp2, tmp3, repValue;
            if (tmp.length == 2) {
                tmp2 = tmp[1].split('<', 1);
                repValue = tmp2[0].trim().replace(/\D/g, '');
            } else {
                tmp = res.split('<div class="reputation">', 2);
                tmp2 = tmp[1].split('?tab=reputation">', 2);
                tmp3 = tmp2[1].split('<', 1);
                repValue = tmp3[0].trim().replace(/\D/g, '');
            }
            //console.log('got rep val: ' + repValue);
            var repLog = Math.round(Math.log10(repValue) * 10);
            //console.log('computed rep = ' + repLog + ' for ' + url);
            show(node, repValue, repLog);
        }
    };
    xhr.open('GET', url, true);
    xhr.send();
}

function makeup(prtNode, repValue, repLog) {
    var hueColor = repLog;
    if (hueColor > 60) hueColor = 60;
    var rgbColor = HSVtoRgb(hueColor * 4 - 30, 25, 95);
    var spanNode = document.createElement('span');
    var textNode = document.createTextNode(repLog);
    spanNode.appendChild(textNode);
    prtNode.appendChild(spanNode);
    if (!prtNode.title) prtNode.title = '' + repValue + ' rep';
    spanNode.style.margin = '3px';
    spanNode.style.paddingLeft = '2px';
    spanNode.style.paddingRight = '2px';
    spanNode.style.borderRadius = '5px';
    spanNode.style.border = '1px solid grey';
    spanNode.style.backgroundColor = '#' + rgbColor;
    spanNode.style.color = '#000';
}

function getMyAccUrl() {
    // if logged in search for tag
    // <a href="/usrNodes/000000/abcdefghijk" class="profile-me js-gps-track" data-gps-track="profile_summary.click()">
    // retrieve the link to own acc
    // parsing of the own acc differs from others
    var ancNodes = document.getElementsByTagName('a');
    var reg = /<a href=".*?" class=".*?profile-me.*?".*?>/i;
    for (var i = 0; i < ancNodes.length; i++) {
        if (reg.test(ancNodes[i].outerHTML)) {
            return ancNodes[i].href;
        }
    }
}

function HSVtoRgb(H, S, V) {
    var f, p, q , t, lH, R, G, B;
    S = (S > 1 )? S / 100 : S;
    V = (V > 1)? V / 100 : V;
    lH = parseInt(H / 60);
    f = H / 60 - lH;
    p = V * (1 - S);
    q = V * (1 - S * f);
    t = (1 - (1 - f) * S);
    switch (lH) {
        case 0: R = V; G = t; B = p; break;
        case 1: R = q; G = V; B = p; break;
        case 2: R = p; G = V; B = t; break;
        case 3: R = p; G = q; B = V; break;
        case 4: R = t; G = p; B = V; break;
        case 5: R = V; G = p; B = q; break;
    }
    return parseInt(R * 16).toString(16) + parseInt(G * 16).toString(16) + parseInt(B * 16).toString(16);
}