jq左右按钮点击幻灯片

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

        "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <script type="text/javascript" src="js/jquery-1.7.min.js"></script>

    <title>左右点击幻灯片</title>

    <style type="text/css">

        *{margin: 0;padding: 0;}

        ul{ list-style: none;}

       .wrapper{width: 300px;height: 200px; margin:100px auto;overflow: hidden;border: 2px solid #ccc;position: relative;}

        .scroll{width: 205px;margin: 0 auto; overflow: hidden;}

       .scroll li{float: left; margin: 5px; height:160px; font-size:60px; text-align:center; line-height:100px; font-weight:800; background:#FF3F00; color:#fff; width:200px;}

        .prev,.next{ width: 30px;height: 30px;background: #daa520;color: #fff;cursor: pointer;position: absolute;top:80px; text-align: center;line-height: 30px;}

        .next{ right: 0;}

    </style>

</head>

<script>

    $(function(){

        var oScroll=$('.scroll>ul'),oLi=oScroll.find('li'),oLen=oLi.length,oPrev=$('.prev'),oNext=$('.next'),oWidth=oLi.eq(0).outerWidth(true),iNow= 1,oCur=$('.count>em'),oCount=$('.count>i'),iTimer=null;

        oScroll.width(oWidth*oLen);

        oCount.html(oLen);

        function count(){

            oCur.html(iNow);

        }

        function Prev(){

            oScroll.css({marginLeft:-oWidth+'px'}).find('li:last').prependTo(oScroll);

            oScroll.stop(true,true).animate({marginLeft:0+'px'},600);

            iNow=iNow>1?iNow-1:oLen;

            count(iNow);

        }

        function Next(){

            oScroll.stop(true,true).animate({marginLeft:-oWidth+'px'},600,function(){

            oScroll.css({marginLeft:0}).find('li:first').appendTo(oScroll);

            })

            iNow=iNow<oLen?iNow+1:1;

            count(iNow);

        }

        oPrev.bind('click',Prev);

        oNext.bind('click',Next);

        iTimer=setInterval(Next,3000);

        $('.wrapper').hover(function(){

            clearInterval(iTimer);

        },function(){

            iTimer=setInterval(Next,3000);

        })

    })

</script>

<body>

<div class="wrapper">

    <span class="prev">《</span>

    <span class="next">》</span>

    <div class="scroll">

           <ul>

            <li>1</li>

            <li>2</li>

            <li>3</li>

            <li>4</li>

        </ul>

    </div>

    <div class="count"><em>1</em>/<i>0</i></div>

</div>

</body>

</html>

 

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