<code lang="JavaScript">

var CSSUtils = {

        hasClass: /*static*/ function (element_, cName_) {
                var _regExp = new RegExp(cName_, "gi");
                return element_ && _regExp.test(element_.className);
        },
        hasNotClass: /*static*/ function (element_, cName_) {
                return !CSSUtils.hasClass(element_, cName_);
        },

        addClass: /*static*/ function (element_, cName_) {
                if (element_) element_.className = element_.className.concat(" ", cName_, " ");
        },

        removeClass: /*static*/ function (element_, cName_) {
                CSSUtils.replaceClass(element_, cName_, "");
        },

        replaceClass: /*static*/ function (element_, cNameReplaced_, cNameReplacement_) {
                if (CSSUtils.hasClass(cNameReplaced_)) {
                        var _regExp = new RegExp(cNameReplaced_, "gi");
                        element_.className = element_.className.replace(_regExp, cNameReplacement_);
                }
                else if (CSSUtils.hasNotClass(cNameReplacement_)) {
                        CSSUtils.addClass(cNameReplacement_);
                }
        }
};

</code>