<div id="focus">

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                <li><p>禅的修行应要无欲无求2</p><a href="http://yunshi.jiyun360.com/" target="_blank" title="十二生肖马年开运宝典">

                <img src="data:images/shenxiao_qietu2.jpg" alt="十二生肖马年开运宝典" /></a></li>

                </ul>

            </div>

/*广告图片切换*/

$(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 = ;

    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 = ; 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).mouseenter(function() {

        index = $("#focus .btn span").index(this);

        showPics(index);

    }).eq().trigger("mouseenter");

    //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" }, );

    }, function() {

        $(this).stop(true, false).animate({ "opacity": "0.2" }, );

    });

    //上一页按钮

    $("#focus .pre").click(function() {

        index -= ;

        if (index == -) { index = len - ; }

        showPics(index);

    });

    //下一页按钮

    $("#focus .next").click(function() {

        index += ;

        if (index == len) { index = ; }

        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 = ; }

        }, ); //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 }, ); //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" }, ).eq(index).stop(true, false).animate({ "opacity": "" }, ); //为当前的按钮切换到选中的效果

    }

});

/*广告图片切换*/

#focus{width:340px;height:256px;overflow:hidden;position:relative;z-index:;}

#focus ul{height:400px;position:absolute;}

#focus ul li{float:left;width:340px;height:318px;overflow:hidden; position:relative; background:#fff; }

#focus ul li p{position:absolute; top:233px; left:10px; font-size:12px; color:#ffffff; z-index:}

#focus ul li div{position:absolute; overflow:hidden;}

#focus .btnBg{position:absolute;width:800px;height:30px;left:;bottom:;background:#;}

#focus .btn{position:absolute;width:780px;height:10px;padding:10px 10px;*padding:10px 10px;right:;bottom:;text-align:right;}

#focus .btn span{display:inline-block;_display:inline;_zoom:;width:10px;height:10px;_font-size:;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(/content/images/sprite.png) no-repeat  ;cursor:pointer;}

#focus .pre{left:;}

#focus .next{right:;background-position:right top;}

#focus ul,li{list-style:none;}

#focus img{border:;}

#focus ul li{float:left;width:340px;height:256px;overflow:hidden;position:relative;background:#fff;}