cpubenchmark average mark

// ==UserScript==
// @name        average_mark
// @namespace   cpubenchmark
// @description cpubenchmark average mark
// @include     http://www.cpubenchmark.net/*cpus.html
// @version     1
// ==/UserScript==

function averageMark() {
    var marks = [];
    var trs = document.getElementById("mark").getElementsByTagName("tr");
    for (var i=0;i<trs.length;i++) {
        var td = trs[i].getElementsByTagName("td").length ? trs[i].getElementsByTagName("td")[1] : 0;
        //console.log(td);
        if (td)
        {
            var html = td.innerHTML.replace(/<span.*<\/span>/,"");
            //console.log(html);
            var markRegExp1 = /[0-9]+,[0-9]{3}/;
            var markRegExp2 = /[0-9]+/;

            if (html.match(markRegExp1)) {
                var mark = html.match(markRegExp1)[0].replace(",",".");
                marks.push(mark);
                //console.log(mark);
            } else if (html.match(markRegExp2)) {
                var mark = html.match(markRegExp2)[0] / 1000;
                marks.push(mark);
            }

        }
    }

    var av = 0;
    for (var i=0;i<marks.length;i++) {
        av += parseFloat(marks[i]);
    }
    av = av / marks.length;
    return av.toFixed(3).replace(".",",");
}

function showAverage(val) {
    var el = document.createElement("div");
    el.className = "notes";
    el.innerHTML = "average : " + val;
    document.getElementById("mark").appendChild(el);
}

window.onload = function(){
    var m = averageMark();
    showAverage(m);
}