jewel.dom = (function() {
    var $ = Sizzle;

    function hasClass(el, clsName) {
        var regex = new RegExp("(^|\\s)" + clsName + "(\\s|$)");
        return regex.test(el.className);
    }

    function addClass(el, clsName) {
        if (!hasClass(el, clsName)) {
            el.className += " " + clsName;
        }
    }

    function removeClass(el, clsName) {
        var regex = new RegExp("(^|\\s)" + clsName + "(\\s|$)");
        el.className = el.className.replace(regex, " ");
    }

    function bind(element, event, handler) {
        if (typeof element == "string") {
            element = $(element)[0];
        }
        element.addEventListener(event, handler, false)
    }

    return {
        $ : $,
        hasClass : hasClass,
        addClass : addClass,
        removeClass : removeClass,
        bind : bind
    };
})();
