js cut words

cut_words.js

function is_word_char(c) {
    return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}

function cut_words(content) {
    var in_word = false;
    var start_word = 0;
    var word;
    var result = [];
    var i;

    for (i = 0; i < content.length; i++) {
        if (is_word_char(content[i])) {
            // char is part of a word
            if (!in_word) {
                // not in a word yet
                in_word = true;
                start_word = i;
            }
        } else {
            // char is not a word
            if (in_word) {
                // end of a word
                in_word = false;

                // now actually cut the word
                // if it's more than one character
                if (i - start_word > 1) {
                    word = content.substring(start_word, i).toLowerCase();
                    result.push(word);
                }
            }
        }
    }

    if (in_word) {
        // we were in a word at the end of the parsing
        if (i - start_word > 1) {
            word = content.substring(start_word, i).toLowerCase();
            result.push(word);
        }
    }
    return result;
}