Function toggleClass

site/static/js/ui.js:13–30

(element, className)

    }

    function toggleClass(element, className) {
        var classes = element.className.split(/\s+/);
        var length = classes.length;
        var i = 0;

        for (; i < length; i++) {
            if (classes[i] === className) {
                classes.splice(i, 1);
                break;
            }
        }
        // The className is not found
        if (length === classes.length) {
            classes.push(className);
        }

        element.className = classes.join(' ');
    }

    function toggleAll() {
        var active = 'active';