generateClassName.js

function generateClassName (amountOfLettersInClassName) {
    amountOfLettersInClassName = amountOfLettersInClassName || 9;
    var className = [];

    for (var i = 0; i < amountOfLettersInClassName; i++) {
        var charCodeOffset = 65;
        var numeral = Math.round(Math.random() * 25) + charCodeOffset;
        var letter = String.fromCharCode(numeral);
        className.push(letter);
    }

    className = className.join('').toLowerCase();
    return className;
}