一个十分不错的返回页面顶部的代码ScrollUp

如何使用

引入 jquery.scrollUp.min.js

下载:scrollup-master

快捷设定

$(function () {
    $.scrollUp();
});

默认配置示例

$(function () {
    $.scrollUp({
        scrollName: 'scrollUp', // Element ID
        scrollDistance: 300, // Distance from top/bottom before showing element (px)
        scrollFrom: 'top', // 'top' or 'bottom'
        scrollSpeed: 300, // Speed back to top (ms)
        easingType: 'linear', // Scroll to top easing (see http://easings.net/)
        animation: 'fade', // Fade, slide, none
        animationInSpeed: 200, // Animation in speed (ms)
        animationOutSpeed: 200, // Animation out speed (ms)
        scrollText: 'Scroll to top', // Text for element, can contain HTML
        scrollTitle: false, // Set a custom <a> title if required. Defaults to scrollText
        scrollImg: false, // Set true to use image
        activeOverlay: false, // Set CSS color to display scrollUp active point, e.g '#00FFFF'
        zIndex: 2147483647 // Z-Index for the overlay
    });
});