js实现日历卡

<style type="text/css">
*{padding:0;margin:0;}
    #tab {
        margin:0 auto;
        width:205px;
        height:335px;
        background:#e8e8e5;
    }
    #tab li{
           width:50px;
           height:50px;
           background:#40403f;
           float:left;
           list-style:none;
           margin-left:12px;
           margin-top:10px;
           text-align:center;
           font-size:12px;
           color:white;
           line-height:25px;
           font-weight:700;
           border:1px solid #40403f;

    }
    #tab #text{
        width:178px;
        height:70px;
        border:1px white solid;
        background:#f0f0ef;
        float:left;
        position:relative;
        top:10px;
        left:12px;
    }
    #tab #text h2{
        margin-left:5px;
        margin-top:5px;
        font-size:16px;
        color:#4c4c4b;
    }
    #tab #text p{
        margin-left:5px;
        margin-top:5px;
        font-size:12px;
        color:#80807f;
    }
    #tab .active{
        color:#db6082;
        background:white;
        
    }
</style>


<div id="tab" clss="calendar"> 
    <ul>
        <li class="active"><h2>1</h2><p>JAN</p></li>
        <li><h2>2</h2><p>FER</p></li>
        <li><h2>3</h2><p>MAR</p></li>
        <li><h2>4</h2><p>APR</p></li>
        <li><h2>5</h2><p>MAY</p></li>
        <li><h2>6</h2><p>JUN</p></li>
        <li><h2>7</h2><p>JUL</p></li>
        <li><h2>8</h2><p>AUG</p></li>
        <li><h2>9</h2><p>SEP</p></li>
        <li><h2>10</h2><p>OCT</p></li>
        <li><h2>11</h2><p>NOV</p></li>
        <li><h2>12</h2><p>DEC</p></li>
    </ul>
    <div id="text">
        
    </div>
</div>

<script>
    window.onload=function()
    {
        var tab=document.getElementById("tab");
        var li=tab.getElementsByTagName("li");
        var text1=document.getElementById("text");
        // var p=text1.getElementsByTagName("p")[0];
        // var h2=text1.getElementsByTagName("h2")[0];
        var text=[‘快过年了，大家可以商量着去哪里玩吧!‘,
                  ‘寒假快结束了，是该时候写作业了‘,
                  ‘开学季了‘,
                  ‘四月是谈恋爱的季节.‘,
                  ‘love‘,
                  ‘you‘,
                  ‘forever‘,
                  ‘and‘,
                  ‘alongside‘,
                  ‘all‘,
                  ‘day‘,
                 ]
        for(var i=0;i<li.length;i++)
        {
            li[i].index=i;
            li[i].onmouseover= function()
            {   
                  for(var i=0;i<li.length;i++)
                  {
                    li[i].className="";
                  }
                  this.className="active";
                  text1.innerHTML= ‘<h2>‘+(this.index+1)+‘月活动</h2><p>‘+text[this.index]+‘</p>‘;

            };
        }
       
    }
</script>