jquery鼠标移入移出事件

<!DOCTYPE html>
<html>

<head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <title></title>
    <style>
    .left div,
    .right div {
        350px;
        height: 150px;
        padding: 5px;
        margin: 5px;
        border: 1px solid #ccc;
    }

    p {
        height: 50px;
        border:1px solid red;
        margin: 30px;
        text-align:center;
      font-size:30px;
      font-style:italic;
      font-weight:bold;
    }
      .p2{display:none}
    .left div {
        background: #bbffaa;
    }

    </style>
    <script src="https://www.imooc.com/static/lib/jquery/1.9.1/jquery.js"></script>
</head>

<body>
    <h2>.hover()方法</h2>
    <div class="left">
        <div class="aaron1">
            <p class="p1">hello</p>
            <p class="p2">2</p>
        </div>
    </div>
    <script type="text/javascript">
    $(".p1").hover(
        function() {
            $(this).css("background", 'red');
            $(this).animate({opacity:0},3000)

        },
        function() {
            $(this).css("background", 'yellow');
             $(this).animate({opacity:1},3000)
        }
    );
     $(".aaron1").hover(
        function() {
            $(this).css("background", '#00ffff');
        },
        function() {
            $(this).css("background", '#ccffcc');
        }
    );
     $("p").mouseout(function(){$(".aaron1").css("background","#ffccff")})
      $("p").mouseover(function(){$(".aaron1").css("background","#33ccff")})

</script>
</body>

</html>

红尘往事，一切随风！