Bookmarklet to count word frequency

word-frequency-counter.js

(function () {
	var settings = {
			listLength: 30,
			ignore: ['if', 'as', 'is', 'the', 'any', 'and', 'to', 'or', 'a', 'of']
		},
		w, s;
	function getBodyText() {
		var doc = document,
			body = doc.body,
			selection, range, bodyText;
		if (body.createTextRange) {
			return body.createTextRange().text;
		} else if (getSelection) {
			selection = getSelection();
			range = doc.createRange();
			range.selectNodeContents(body);
			selection.addRange(range);
			bodyText = selection.toString();
			selection.removeAllRanges();
			return bodyText;
		}
	}

	var punctuation = /[\/\.\*\+\+\?\|\(\)\[\]\{\}\^\\,:;-`~!@#$%&_]+/g;
	var words = getBodyText().trim().replace(punctuation, ' ').replace(/\s+/g, ' ').split(' '),
		count = {},
		sorted = [];

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

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

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

	var output = '<title>ספירת מילים</title><ul style="direction: rtl; text-align: right; font-family: sans-serif; line-height: 130%;">';
	for (s in sorted.slice(0, settings.listLength)) {
		var c = sorted[s];
		output += '<li>' + c[1] + ': ' + c[0] + '</li>';
	}
	output += '</ul>';

	with(open().document){
		write(output);
		close();
	}
})();