code: function startAnimation() {
      if (isIE8) {
        return;
      }
      // stop any already running animations
      stopAnimation();
      var fnc = function () {
        addClass(CTX.box, _const_class_prefix + '-loading');
        if (!isIE9 && typeof CTX.opt.loadingAnimation === 'number') {
          var index = 0;
          animationInt = setInterval(function () {
            addClass(animationChildren[index], _const_class_prefix + '-active');
            setTimeout(function () {
              removeClass(animationChildren[index], _const_class_prefix + '-active');
            }, CTX.opt.loadingAnimation);
            index = index >= animationChildren.length ? 0 : index += 1;
          }, CTX.opt.loadingAnimation);
        }
      };
      // set timeout to not show loading animation on fast connections
      animationTimeout = setTimeout(fnc, 500);
    }
docs: Starts the loading animation