jQuery网站右侧悬浮楼层滚动导航代码是一款全屏的悬浮导航菜单控制页面滚动跳转楼层效果，还显示滚动百分比。

部分js代码

<script>
(function () {
		
   //////////////////////
	// Utils
  //////////////////////
    function throttle(fn, delay, scope) {
        // Default delay
        delay = delay || 250;
        var last, defer;
        return function () {
            var context = scope || this,
                now = +new Date(),
                args = arguments;
            if (last && now < last + delay) {
                clearTimeout(defer);
                defer = setTimeout(function () {
                    last = now;
                    fn.apply(context, args);
                }, delay);
            } else {
                last = now;
                fn.apply(context, args);
            }
        }
    }

    function extend(destination, source) {
        for (var k in source) {
            if (source.hasOwnProperty(k)) {
                destination[k] = source[k];
            }
        }
        return destination;
    }
</script>