// ==UserScript==
// @name	平滑的滚动到顶部/底部
// @author	burningall
// @description	为网页增加滚到顶部和底部按钮
// @version     2015.3.24-1.0
// @include			http://*
// @include			https://*
// @include			ftp://*
// @supportURL		http://www.burningall.com
// @contributionURL	troy450409405@gmail.com|alipay.com
// @namespace https://greasyfork.org/zh-CN/users/3400-axetroy
// @downloadURL none
// ==/UserScript==

function addEvent(obj,event,fn){return obj.addEventListener?obj.addEventListener(event,fn,false):obj.attachEventListener("on"+event,fn);}(addEvent(window,"load",function(){function $(id){return document.getElementById(id);}function getStyle(obj,attr){return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr];}function getScrollTop(){return document.documentElement.scrollTop?document.documentElement.scrollTop:document.body.scrollTop;}function getClientHeight(){return document.documentElement?document.documentElement.clientHeight:document.body.clientHeight;}function getScrollHeight(){return document.body?bodyScrollHeight=document.body.scrollHeight:document.documentElement.scrollHeight;}function createElement(tagName,idName,styleList,appendPosition,endFn){var newElement=document.createElement(tagName);newElement.id=idName;newElement.style.cssText=styleList;appendPosition&&appendPosition.appendChild(newElement);endFn&&endFn();}function doMove(obj,attr,dir,target,endFn){dir=parseInt(getStyle(obj,attr))<target?dir:-dir;clearInterval(obj.timer);obj.timer=setInterval(function(){var speed=parseInt(getStyle(obj,attr))+dir;if(speed>target&&dir>0||speed<target&&dir<0){speed=target;}obj.style[attr]=speed+"px";if(speed==target){clearInterval(obj.timer);endFn&&endFn();}},30);}createElement("div","scrollMars-troy","width:100px;height:120px;position:fixed;right:20px;top:200px",document.documentElement);$("scrollMars-troy").innerHTML="<div id='goTop-troy' class='Top-and-Btn'></div><div id='goBtn-troy' class='Top-and-Btn'></div>";var scrollStyle="width:40px;height:40px;text-align:center;padding:5px;margin:5px auto;background:#303030;color:#fff;display:block;opacity:0.8;fitter:alpha(opacity:80);cursor:pointer;border-radius:50%;box-shadow:2px 2px 40px 2px #303030;font-size:16px";$("goTop-troy").style.cssText=scrollStyle;$("goBtn-troy").style.cssText=scrollStyle;$("goTop-troy").innerHTML="顶<br/>部";$("goBtn-troy").innerHTML="底<br/>部";addEvent($("goTop-troy"),"click",function(){clearInterval($("goTop-troy").timer);$("goTop-troy").timer=setInterval(function(){var speed=(getScrollTop()/5)+10;position=getScrollTop()-speed;if(position<=0){document.body.scrollTop=document.documentElement.scrollTop=0;clearInterval($("goTop-troy").timer);$("goTop-troy").timer=null;}document.body.scrollTop=document.documentElement.scrollTop=position;},30);});addEvent($("goBtn-troy"),"click",function(){clearInterval($("goTop-troy").timer);$("goTop-troy").timer=setInterval(function(){var speed=(getScrollTop()/5)+10;position=getScrollTop()+speed;if(position+getClientHeight()>=getScrollHeight()){document.body.scrollTop=document.documentElement.scrollTop=getScrollHeight();clearInterval($("goTop-troy").timer);$("goTop-troy").timer=null;}document.body.scrollTop=document.documentElement.scrollTop=position;},30);});addEvent($("scrollMars-troy"),"mouseover",function(){doMove($("scrollMars-troy"),"right",10,20,function(){doMove($("scrollMars-troy"),"width",20,100);});});addEvent($("scrollMars-troy"),"mouseout",function(){doMove($("scrollMars-troy"),"right",10,-80,function(){doMove($("scrollMars-troy"),"width",20,160);});});addEvent($("goTop-troy"),"mouseover",function(){$("goTop-troy").style.background="#FF0004";});addEvent($("goTop-troy"),"mouseout",function(){$("goTop-troy").style.background="#303030";});addEvent($("goBtn-troy"),"mouseover",function(){$("goBtn-troy").style.background="#FF0004";});addEvent($("goBtn-troy"),"mouseout",function(){$("goBtn-troy").style.background="#303030";});}));