滚动到顶部-jquery.scrolltotop.js
使用教程： 直接粘贴下面的代码， 作为一个 jquery.scrolltotop.js 引入 配置参数： scrolltotop.setting.startline = 100; // 还有controlHTML参数等等可配置 初始化插件： scrolltotop.init(); //** jQuery Scroll to Top Control script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com. //** Available/ usage terms at http://www.dynamicdrive.com (March 30th, 09') //** v1.1 (April 7th, 09'): //** 1) Adds ability to scroll to an absolute position (from top of page) or specific element on the page instead. //** 2) Fixes scroll animation not working in Opera. var scrolltotop = { setting: { startline: 1, // 开始出现回到顶部控件的scrollTop值