js上下滚屏效果，代码通过测试

这是html代码

<div class="box">

    <div class="bcon">

        <h1><b>领号实时播报</b></h1>

        <!-- 代码开始 -->

        <div class="list_lh">

            <ul>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">1000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">2000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">3000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">4000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">5000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">6000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">7000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">8000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">9000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">1000000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">1100000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

                <li>

                    <p><a href="http://www.16sucai.com/" target="_blank">1200000</a><a href="http://www.16sucai.com/" target="_blank" class="btn_lh">领号</a><em>获得</em></p>

                    <p><a href="http://www.16sucai.com/" target="_blank" class="a_blue">网游战江湖公测豪华礼包</a><span>17:28:05</span></p>

                </li>

            </ul>

        </div>

        <!-- 代码结束 -->

    </div>

    <script type="text/javascript">

$(document).ready(function(){

    $('.list_lh li:even').addClass('lieven');

})

$(function(){

    $("div.list_lh").myScroll({

        speed:40, //数值越大，速度越慢

        rowHeight:68 //li的高度

    });

});

</script>

</div>

这是css代码

/* CSS Document */

*{margin:;padding:;font-size:12px;}

body{ background:none;}

input,button,select,textarea{outline:none;}

ul,li,dl,ol{list-style:none;}

a{color:#666; text-decoration:none;}

.box{ width:980px; margin:0 auto;}

.bcon{ width:270px; border:1px solid #eee; margin:30px auto;}

.bcon h1{ border-bottom:1px solid #eee; padding:0 10px;}

.bcon h1 b{ font:bold 14px/40px '宋体'; border-top:2px solid #3492D1; padding:0 8px; margin-top:-1px; display:inline-block;}

.list_lh{ height:400px; overflow:hidden;}

.list_lh li{ padding:10px;}

.list_lh li.lieven{ background:#F0F2F3;}

.list_lh li p{ height:24px; line-height:24px;}

.list_lh li p a{ float:left;}

.list_lh li p em{ width:80px; font:normal 12px/24px Arial; color:#FF3300; float:right; display:inline-block;}

.list_lh li p span{ color:#999; float:right;}

.list_lh li p a.btn_lh{ background:#28BD19; height:17px; line-height:17px; color:#fff; padding:0 5px; margin-top:4px; display:inline-block; float:right;}

.btn_lh:hover{ color:#fff; text-decoration:none;}

.btm p{ font:normal 12px/24px 'Microsoft YaHei'; text-align:center;}

这是js代码

// JavaScript Document

(function($){

    $.fn.myScroll = function(options){

    //默认配置

    var defaults = {

        speed:40,  //滚动速度,值越大速度越慢

        rowHeight:24 //每行的高度

    };

    var opts = $.extend({}, defaults, options),intId = [];

    function marquee(obj, step){

        obj.find("ul").animate({

            marginTop: '-=1'

        },0,function(){

                var s = Math.abs(parseInt($(this).css("margin-top")));

                if(s >= step){

                    $(this).find("li").slice(0, 1).appendTo($(this));

                    $(this).css("margin-top", 0);

                }

            });

        }

        this.each(function(i){

            var sh = opts["rowHeight"],speed = opts["speed"],_this = $(this);

            intId[i] = setInterval(function(){

                if(_this.find("ul").height()<=_this.height()){

                    clearInterval(intId[i]);

                }else{

                    marquee(_this, sh);

                }

            }, speed);

            _this.hover(function(){

                clearInterval(intId[i]);

            },function(){

                intId[i] = setInterval(function(){

                    if(_this.find("ul").height()<=_this.height()){

                        clearInterval(intId[i]);

                    }else{

                        marquee(_this, sh);

                    }

                }, speed);

            });

        });

    }

})(jQuery);

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js上下滚屏效果，代码通过测试

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