轮播图2(jQ)

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<!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=utf-8" /><title>jquery图片滚动仿QQ商城带左右按钮控制焦点图片切换滚动</title><meta name="description" content="jquery图片特效制作仿腾讯QQ商城首页banner焦点图片轮播切换效果,带索引按钮控制和左右按钮控制图片切换。jquery下载。" /><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;}#focus li img {    width: 100%;    height: 100%;}  </style><script type="text/javascript" src="jquery-1.8.3.min.js"></script><script type="text/javascript">$(function() {    var sWidth = $("#focus").width(); //获取焦点图的宽度(显示面积)    var len = $("#focus ul li").length; //获取焦点图个数    var index = 0;    var picTimer;    //以下代码添加数字按钮和按钮后的半透明条,还有上一页、下一页两个按钮    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);    //为小按钮添加鼠标滑入事件,以显示相应的内容    $("#focus .btn span").css("opacity",0.4).mouseover(function() {        index = $("#focus .btn span").index(this);        showPics(index);    }).eq(0).trigger("mouseover");    //上一页、下一页按钮透明度处理    $("#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);    });    //上一页按钮    $("#focus .pre").click(function() {        index -= 1;        if(index == -1) {index = len - 1;}        showPics(index);    });    //下一页按钮    $("#focus .next").click(function() {        index += 1;        if(index == len) {index = 0;}        showPics(index);    });    //本例为左右滚动,即所有li元素都是在同一排向左浮动,所以这里需要计算出外围ul元素的宽度    $("#focus ul").css("width",sWidth * (len));    //鼠标滑上焦点图时停止自动播放,滑出时开始自动播放    $("#focus").hover(function() {        clearInterval(picTimer);    },function() {        picTimer = setInterval(function() {            showPics(index);            index++;            if(index == len) {index = 0;}        },1000); //此4000代表自动播放的间隔,单位:毫秒    }).trigger("mouseleave");    //显示图片函数,根据接收的index值显示相应的内容    function showPics(index) { //普通切换        var nowLeft = -index*sWidth; //根据index值计算ul元素的left值        $("#focus ul").stop(true,false).animate({"left":nowLeft},300); //通过animate()调整ul元素滚动到计算出的position        //$("#focus .btn span").removeClass("on").eq(index).addClass("on"); //为当前的按钮切换到选中的效果        $("#focus .btn span").stop(true,false).animate({"opacity":"0.4"},300).eq(index).stop(true,false).animate({"opacity":"1"},300); //为当前的按钮切换到选中的效果    }});</script></head><body>    <div class="wrapper">        <h1>jquery图片滚动仿QQ商城带左右按钮控制焦点图片切换滚动</h1>        <div id="focus">            <ul>                <li><a href="#" target="_blank"><img src="images/1.jpg" alt="QQ商城焦点图效果下载" /></a></li>                <li><a href="#" target="_blank"><img src="images/2.jpg" alt="QQ商城焦点图效果教程" /></a></li>                <li><a href="#" target="_blank"><img src="images/3.jpg" alt="jquery商城焦点图效果" /></a></li>                <li><a href="#" target="_blank"><img src="images/4.jpg" alt="jquery商城焦点图代码" /></a></li>                <!-- <li><a href="#" target="_blank"><img src="images/5.jpg" alt="jquery商城焦点图源码" /></a></li> -->            </ul>        </div><!--focus end-->    </div><!-- wrapper end --></body></html>
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