!added) {
                var head = document.head || document.getElementsByTagName('head')[0],
                    style = document.createElement('style');

                style.type = 'text/css';
                style.id = styleId;
                if (style.styleSheet){
                    style.styleSheet.cssText = styles;
                } else {
                    style.appendChild(document.createTextNode(styles));
                }
                head.appendChild(style);
                // Set adde