无缝滚动研究
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"/> <title>JavaScript 无缝八向滚动(兼容ie/ff)</title> </head> <body> <script type="text/javascript"> var $ = function (id) { return "string" == typeof id ? document.getElementById(id) : id; }; var Class = { create: function () { return function () { this.initialize.apply(this, arguments); } } } Object.extend = function (destination, source) { for (var property in source) { destination[property] = source[property]; } return destination; } function addEventHandler(oTarget, sEventType, fnHandler) { if (oTarget.addEventListener) { oTarget.addEventListener(sEventType, fnHandler, false); } else if (oTarget.attachEvent) { oTarget.attachEvent("on" + sEventType, fnHandler); } else { oTarget["on" + sEventType] = fnHandler; } } ; var Scroller = Class.create(); Scroller.prototype = { initialize: function (idScroller, idScrollMid, options) { var oScroll = this, oScroller = $(idScroller), oScrollMid = $(idScrollMid); this.SetOptions(options); this.scroller = oScroller; //对象 this.timer = null; //时间 this.Side = []; //方向 this.side = 0; //参数 //方向设置 switch (this.options.Side.toLowerCase()) { case "right-down" : this.Side = ["right", "down"]; break; case "right-up" : this.Side = ["right", "up"]; break; case "left-down" : this.Side = ["left", "down"]; break; case "left-up" : this.Side = ["left", "up"]; break; case "right" : this.Side = ["right"]; break; case "left" : this.Side = ["left"]; break; case "down" : this.Side = ["down"]; break; case "up" : default : this.Side = ["up"]; } //用于上下滚动 this.heightScroller = parseInt(oScroller.style.height) || oScroller.offsetHeight; this.heightList = oScrollMid.offsetHeight; //用于左右滚动 this.widthScroller = parseInt(oScroller.style.width) || oScroller.offsetWidth; this.widthList = oScrollMid.offsetWidth; //js取不到css设置的height和width oScroller.style.overflow = "hidden"; oScrollMid.appendChild(oScrollMid.cloneNode(true)); oScrollMid.appendChild(oScrollMid.cloneNode(true)); addEventHandler(oScroller, "mouseover", function () { oScroll.Stop(); }); addEventHandler(oScroller, "mouseout", function () { oScroll.Start(); }); this.Start(); }, //设置默认属性 SetOptions: function (options) { this.options = {//默认值 Step: 1,//每次变化的px量 Speed: 15,//速度(越大越慢) Side: "up"//滚动方向:"up"是上，"down"是下，"left"是左，"right"是右 }; Object.extend(this.options, options || {}); }, //上下滚动 ScrollUpDown: function () { debugger; this.scroller.scrollTop = this.GetScroll(this.scroller.scrollTop, this.heightScroller, this.heightList); var oThis = this; this.timer = window.setTimeout(function () { oThis.Start(); }, this.options.Speed); }, //左右滚动 ScrollLeftRight: function () { //注意:scrollLeft超过1400会自动变回1400 注意长度 this.scroller.scrollLeft = this.GetScroll(this.scroller.scrollLeft, this.widthScroller, this.widthList); var oThis = this; this.timer = window.setTimeout(function () { oThis.Start(); }, this.options.Speed); }, //获取设置滚动数据 GetScroll: function (iScroll, iScroller, iList) { if (this.side > 0) { if (iScroll >= (iList * 2 - iScroller)) { iScroll -= iList; } } else { if (iScroll <= 0) { iScroll += iList; } } return (iScroll + this.options.Step * this.side); }, //开始 Start: function () { var res = this.Side.shift().toLowerCase(); this.Side.push(res); //document.getElementById("test").innerHTML+=s+","; //方向设置 switch (this.Side[0].toLowerCase()) { case "right" : if (this.widthList < this.widthScroller) return; this.side = -1; this.ScrollLeftRight(); break; case "left" : if (this.widthList < this.widthScroller) return; this.side = 1; this.ScrollLeftRight(); break; case "down" : if (this.heightList < this.heightScroller) return; this.side = -1; this.ScrollUpDown(); break; case "up" : default : console.log(this.heightList); console.log(this.heightScroller); if (this.heightList < this.heightScroller) { return; } this.side = 1; this.ScrollUpDown(); } }, //停止 Stop: function () { clearTimeout(this.timer); } }; window.onload = function () { new Scroller("idScroller", "idScrollMid", {Side: "up-down"}); } </script> <style> * { margin: 0px; padding: 0px; } .Scroller { line-height: 150px; overflow: hidden; border: 1px solid #000000; } .ScrollMid { float: left; } .ScrollMid ul { width: 250px; float: left; overflow: hidden; } .ScrollMid li { list-style: none; } </style> <div id="idScroller" class="Scroller" style="250px; height:100px;"> <div style="500px"> <div id="idScrollMid" class="ScrollMid"> <ul> <li><img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s017.jpg" alt=""/></li> <li><img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s018.jpg" alt=""/></li> </ul> </div> </div> </div> </body> </html>