First of all, I would like to thank Mr. Blue for his javascript tutorial, which gave me a lot of inspiration. After watching the video section 10 - Use of timers - 2, I tried to rewrite the code with jQuery. It feels at least more reliable than the one found on Baidu. Here’s the code:
<!DOCTYPE HTML><html lang="en-US"><head> <meta charset="UTF-8"> <title></title> <script type="text/javascript" src = "jquery_v1.7.2.js"></script> <script type="text/javascript">$(document).ready(function (){/*=============Author:GinoBlog:http://www.cnblogs.com/ginowang42Thanks：@Blue--http://www.zhinengshe.com/video.html#1Name:jQuery插件图片左右无缝滚动Arguments: @leftBtn:向左滚动按钮DOM引用 @rightBtn:向右滚动按钮DOM引用 @speed：滚动速度（每次滚动像素数）CSS keyed Attribute: #noSeamScroll{position:relative;overflow:hidden;} #noSeamScroll ul{position:absolute;} #noSeamScroll ul li {float:left;} ===============*/ $.fn.extend({noSeamScroll:function (leftBtn,rightBtn,speed){ var timeFlag = speed = speed || 4;; var timer = null; var _this = this;//把this重新保存在一个私有变量里面，以防止setInterval误把this指向了window this.oUl = $("ul",this); this.oUl.html(this.oUl.html() + this.oUl.html());//把li复制一份 this.oLis = $("ul li",this);//之后再变量保存li的全部节点 this.oUl.width(this.oLis.eq(0).outerWidth(true)*this.oLis.length + "px"); var fnMove = function (){ $("ul",_this).css("left",function (){ if ($(this).position().left > 0){//这里的this指的是$("ul",element) return -$(this).outerWidth(true)/2 + "px"; } if ($(this).position().left < -$(this).outerWidth(true)/2 ){ return "0px"; } return $(this).position().left + timeFlag + "px"; }) } timer = setInterval(fnMove,30); this.mouseover(function () {clearInterval(timer);}); this.mouseout(function () {timer = setInterval(fnMove,30)}); leftBtn.click(function (){ clearInterval(timer); timeFlag = -speed; timer = setInterval(fnMove,30); }) rightBtn.click(function (){ clearInterval(timer); timeFlag = speed; timer = setInterval(fnMove,30); }) } }); //test $("#noSeamScroll").noSeamScroll($("#leftArr"),$("#rightArr"),2); }) </script> <style type="text/css"> *{margin:0;padding:0;} #noSeamScroll{width:752px;height:108px;margin:20px auto;position:relative;overflow:hidden;} #noSeamScroll ul{position:absolute;list-style:none;} #noSeamScroll ul li {float:left;width:178px;height:108px;margin-right:10px;} </style></head><body><a href="javascript:;" id="leftArr">向左移动</a><a href="javascript:;" id="rightArr">向右移动</a> <div id = "noSeamScroll"> <ul> <li><img src="images/1.jpg" alt="" /></li> <li><img src="images/2.jpg" alt="" /></li> <li><img src="images/3.jpg" alt="" /></li> <li><img src="images/4.jpg" alt="" /></li> </ul> </div></body></html>
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