自己寫了一個純jq形式的橫向輪播焦點圖，可點擊小圓點或者左右按鈕進行切換，屬于定寬類型。改成自適應寬度的也不難，將css里面的bannerCon寬度改為百分比，再在js里面將ul和li的寬度跟隨父級容器的寬度變化即可，需要用到$(window).resize。
兼容到IE6+以上瀏覽器，有輪播速度和切換間隔兩個參數可以改。
效果圖如下：
Html代碼如下：
<html><head> <meta charset="utf-8"> <title>banner圖</title> <link href="css/style.css" rel="stylesheet"/> <script src="js/jquery-1.9.1.min.js"></script> <script src="js/common.js"></script></head><body> <div class="wrap"> <div class="banner"> <div class="bannerCon"> <ul class="imgList"> <li><a href="#"><img src="images/banner01.jpg" alt=""/></a></li> <li><a href="#"><img src="images/banner02.jpg" alt=""/></a></li> <li><a href="#"><img src="images/banner03.jpg" alt=""/></a></li> </ul> <ul class="btnList clearfix"> <li class="cur"><span></span></li> <li><span></span></li> <li><span></span></li> </ul> <span class="pre-nex prev"><</span> <span class="pre-nex next">></span> </div> </div> </div></body></html>
Css樣式如下：
@charset "utf-8";/* 簡單reset */body, p, ul, ol, li { margin: 0; padding: 0;}ul, ol { list-style: none;}img { border:none; }a,button{ outline: none; }.clearfix:after { visibility: hidden; display: block; font-size: 0; content: " "; clear: both; height: 0;} /* 具體樣式 */.banner { position: relative; height: 400px; overflow: hidden;}.banner .bannerCon { position: absolute; top: 0; left: 50%; width: 800px; height: 400px; margin-left: -400px; overflow: hidden;}.bannerCon .imgList { position: absolute; top: 0; left: 0; width: 99999px; height: 400px;}.bannerCon .imgList li { float: left; width: 800px; height: 400px;}.bannerCon .imgList li a { position: relative; display: block; height: 100%;}.bannerCon .imgList li img { width: 800px; height: 400px;}.bannerCon .pre-nex { display: none; position: absolute; top: 50%; width: 40px; height: 60px; margin-top: -40px; font: bold 40px/60px Simsun; color: #ccc; text-align: center; border:none; background: rgba(0,0,0,.30); filter:progid:DXImageTransform.Microsoft.Gradient(startColorStr=#4c000000, endColorStr=#4c000000); cursor: pointer; z-index: 3;}.bannerCon .pre-nex.show { display: inline-block; }.bannerCon .prev { left: 13%; }.bannerCon .next { right: 13%; }.bannerCon .btnList { position: absolute; left: 0; bottom: 20px; width: 100%; height: 12px; text-align:center; z-index: 2; _overflow: hidden;}.bannerCon .btnList li { display: inline; }.bannerCon .btnList li span { display: inline-block; width: 12px; height: 12px; margin: 0 5px; border-radius: 6px; background-color:#14829e; cursor: pointer;}.bannerCon .btnList li.cur span { background-color: #f30; }Js代碼如下：
//加載在文本讀取之后的js語句 開始 ============================================================= function Scroll(obj,speed,interval){ //父級容器，輪播速度，切換間隔 $("."+obj).each(function(){ var $box = $(this), $imgUl = $box.children(".imgList"), $imgLi = $imgUl.children("li"), $btnUl = $box.children(".btnList"), $btnLi = $btnUl.children("li"), $btnPreNex = $box.children(".pre-nex"), $btnPre = $box.children(".prev"), $btnNex = $box.children(".next"), n = $imgLi.length, width = $imgLi.width(), left = parseFloat($imgUl.css("left")), k = 0, Player; $imgUl.css("width",n*width); function scroll(){ //輪播事件 $imgUl.stop().animate({left:-width},speed,function(){ k += 1; $imgUl.css("left",0); $imgUl.children("li:first").appendTo($(this)); $btnLi.removeClass('cur'); if(k >= n){ k = 0; } $btnUl.children("li").eq(k).addClass('cur'); }); } $btnLi.click(function(){ //小圓點點擊事件 var index = $btnLi.index(this); $(this).addClass('cur').siblings("li").removeClass('cur'); if(index >= k){ var dif = index-k; left = -dif*width; $imgUl.stop().animate({left:left},speed,function(){ $imgUl.css("left",0); $imgUl.children("li:lt("+dif+")").appendTo($imgUl); }); } else{ var j = n-(k-index); $imgUl.css("left",(index-k)*width); $imgUl.children("li:lt("+j+")").appendTo($imgUl); $imgUl.stop().animate({left:0},speed); } k = index; }); $btnPreNex.click(function(){ //左右按鈕點擊事件 var index = $btnLi.index(this); if($(this).hasClass('next')){ if(!$imgUl.is(":animated")){ k += 1; $imgUl.animate({left:-width},speed,function(){ $imgUl.css("left",0); $imgUl.children("li:first").appendTo($(this)); if(k >= n){ k = 0; } $btnUl.children("li").removeClass('cur').eq(k).addClass('cur'); }); } } else { if(!$imgUl.is(":animated")){ k += -1; $imgUl.css("left",-width); $imgUl.children("li:last").prependTo($imgUl); $imgUl.stop().animate({left:0},speed); if(k < 0){ k = n-1; } $btnUl.children("li").removeClass('cur').eq(k).addClass('cur'); } } }); $box.hover( //鼠標移入、移出事件 function(){ clearInterval(Player); $btnPreNex.addClass('show'); }, function(){ Player = setInterval(function(){scroll()},interval); $btnPreNex.removeClass('show'); } ); Player = setInterval(function(){scroll()},interval); }); } $(function () { //讀取輪播事件 Scroll("bannerCon",600,4000); }); 注意加載一下jq庫，我用的是1.9.1的，其實1.7+的都沒問題的。
更多精彩內容大家還可以參考《jQuery焦點圖特效匯總》進行學習，希望大家喜歡。
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