 
<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>jquery圖片滾動(dòng)仿QQ商城帶左右按鈕控制焦點(diǎn)圖片切換滾動(dòng)</title> 
<meta name="description" content="jquery圖片特效制作仿騰訊QQ商城首頁(yè)banner焦點(diǎn)圖片輪播切換效果，帶索引按鈕控制和左右按鈕控制圖片切換" /> 
<style type="text/css"> 
*{margin:0;padding:0;} 
body{font-size:12px;color:#222;font-family:Verdana,Arial,Helvetica,sans-serif;background:#f0f0f0;} 
.clearfix:after{content: ".";display: block;height: 0;clear: both;visibility: hidden;} 
.clearfix{zoom:1;} 
ul,li{list-style:none;} 
img{border:0;} 
.wrapper{width:800px;margin:0 auto;padding-bottom:50px;} 
h1{height:50px;line-height:50px;font-size:22px;font-weight:normal;font-family:"Microsoft YaHei",SimHei;margin-bottom:20px;} 
/* focus */ 
#focus{width:800px;height:280px;overflow:hidden;position:relative;} 
#focus ul{height:380px;position:absolute;} 
#focus ul li{float:left;width:800px;height:280px;overflow:hidden;position:relative;background:#000;} 
#focus ul li div{position:absolute;overflow:hidden;} 
#focus .btnBg{position:absolute;width:800px;height:20px;left:0;bottom:0;background:#000;} 
#focus .btn{position:absolute;width:780px;height:10px;padding:5px 10px;right:0;bottom:0;text-align:right;} 
#focus .btn span{display:inline-block;_display:inline;_zoom:1;width:25px;height:10px;_font-size:0;margin-left:5px;cursor:pointer;background:#fff;} 
#focus .btn span.on{background:#fff;} 
#focus .preNext{width:45px;height:100px;position:absolute;top:90px;background:url(img/sprite.png) no-repeat 0 0;cursor:pointer;} 
#focus .pre{left:0;} 
#focus .next{right:0;background-position:right top;} 
</style> 
<script type="text/javascript" src="http://jt.875.cn/js/jquery.js"></script> 
<script type="text/javascript"> 
$(function() { 
var sWidth = $("#focus").width(); //獲取焦點(diǎn)圖的寬度（顯示面積） 
var len = $("#focus ul li").length; //獲取焦點(diǎn)圖個(gè)數(shù) 
var index = 0; 
var picTimer; 

//以下代碼添加數(shù)字按鈕和按鈕后的半透明條，還有上一頁(yè)、下一頁(yè)兩個(gè)按鈕 
var btn = "<div class='btnBg'></div><div class='btn'>"; 
for(var i=0; i < len; i++) { 
btn += "<span></span>"; 
} 
btn += "</div><div class='preNext pre'></div><div class='preNext next'></div>"; 
$("#focus").append(btn); 
$("#focus .btnBg").css("opacity",0.5); 
//為小按鈕添加鼠標(biāo)滑入事件，以顯示相應(yīng)的內(nèi)容 
$("#focus .btn span").css("opacity",0.4).mouseover(function() { 
index = $("#focus .btn span").index(this); 
showPics(index); 
}).eq(0).trigger("mouseover"); 
//上一頁(yè)、下一頁(yè)按鈕透明度處理 
$("#focus .preNext").css("opacity",0.2).hover(function() { 
$(this).stop(true,false).animate({"opacity":"0.5"},300); 
},function() { 
$(this).stop(true,false).animate({"opacity":"0.2"},300); 
}); 
//上一頁(yè)按鈕 
$("#focus .pre").click(function() { 
index -= 1; 
if(index == -1) {index = len - 1;} 
showPics(index); 
}); 
//下一頁(yè)按鈕 
$("#focus .next").click(function() { 
index += 1; 
if(index == len) {index = 0;} 
showPics(index); 
}); 
//本例為左右滾動(dòng)，即所有l(wèi)i元素都是在同一排向左浮動(dòng)，所以這里需要計(jì)算出外圍ul元素的寬度 
$("#focus ul").css("width",sWidth * (len)); 

//鼠標(biāo)滑上焦點(diǎn)圖時(shí)停止自動(dòng)播放，滑出時(shí)開(kāi)始自動(dòng)播放 
$("#focus").hover(function() { 
clearInterval(picTimer); 
},function() { 
picTimer = setInterval(function() { 
showPics(index); 
index++; 
if(index == len) {index = 0;} 
},4000); //此4000代表自動(dòng)播放的間隔，單位：毫秒 
}).trigger("mouseleave"); 

//顯示圖片函數(shù)，根據(jù)接收的index值顯示相應(yīng)的內(nèi)容 
function showPics(index) { //普通切換 
var nowLeft = -index*sWidth; //根據(jù)index值計(jì)算ul元素的left值 
$("#focus ul").stop(true,false).animate({"left":nowLeft},300); //通過(guò)animate()調(diào)整ul元素滾動(dòng)到計(jì)算出的position 

$("#focus .btn span").stop(true,false).animate({"opacity":"0.4"},300).eq(index).stop(true,false).animate({"opacity":"1"},300); //為當(dāng)前的按鈕切換到選中的效果 
} 
}); 
</script> 
</head> 
<body> 
<div class="wrapper"> 
<h1>jquery圖片滾動(dòng)仿QQ商城帶左右按鈕控制焦點(diǎn)圖片切換滾動(dòng)</h1> 

<div id="focus"> 
<ul> 
<li><a  target="_blank"><img src="img/01.jpg" alt="QQ商城焦點(diǎn)圖效果下載" /></a></li> 
<li><a  target="_blank"><img src="img/02.jpg" alt="QQ商城焦點(diǎn)圖效果教程" /></a></li> 
<li><a  target="_blank"><img src="img/03.jpg" alt="jquery商城焦點(diǎn)圖效果" /></a></li> 
<li><a  target="_blank"><img src="img/04.jpg" alt="jquery商城焦點(diǎn)圖代碼" /></a></li> 
<li><a  target="_blank"><img src="img/05.jpg" alt="jquery商城焦點(diǎn)圖源碼" /></a></li> 
</ul> 
</div><!--focus end--> 

</div><!-- wrapper end --> 
</body> 
</html> 