Bookmarklet to count word frequency

word-frequency-counter.js

(function () {
    function getBodyText(win) {
        var doc = win.document,
            body = doc.body,
            selection, range, bodyText;
        if (body.createTextRange) {
            return body.createTextRange().text;
        } else if (win.getSelection) {
            selection = win.getSelection();
            range = doc.createRange();
            range.selectNodeContents(body);
            selection.addRange(range);
            bodyText = selection.toString();
            selection.removeAllRanges();
            return bodyText;
        }
    }
    var words = getBodyText(window).trim().replace(/[\r\n\.\,\;]+/g, ' ').replace(/\s+/g, ' ').split(' '),
        count = {},
        sorted = [];

    for (var w in words) if (words.hasOwnProperty(w)) {
        var word = words[w];
        count[word] = count[word] ? count[word] + 1 : 1;
    }

    for (var w in count) if (count.hasOwnProperty(w)) {
        sorted.push([w, count[w]])
    }

    var s = sorted.sort(function (a, b) {
        return b[1] - a[1];
    });

    for (var s in sorted.slice(0, 100)) {
        var c = sorted[s];
        console.log(c[1] + ' -> ' + c[0])
    }
})();