jQuery网站右侧悬浮楼层滚动导航代码

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>