JQuery操作基本选择器

<body>
        <input type="button" id="btn1" value="选择为one的元素"/>
        <input type="button" id="btn2" value="选择样式为mini的元素"/>
        <input type="button" id="btn3" value="选择所有的div元素"/>
        <input type="button" id="btn4" value="选择所有元素"/>
        <input type="button" id="btn5" value="选择id为two并且样式为mini的元素"/>
        <hr/>
        <div id="one">
            <div class="mini">
                111
            </div>
        </div>

        <div id="two">
            <div class="mini">
                222
            </div>
            <div class="mini">
                333
            </div>
        </div>

        <div id="three">
            <div class="mini">
                444
            </div>
            <div class="mini">
                555
            </div>
            <div class="mini">
                666
            </div>
        </div>

        <span id="four">

        </span>
    </body>

style.css

body { font:12px/19px Arial, Helvetica, sans-serif; color:#666;}
form div { margin:5px 0;}
.int label { float:left; width:100px; text-align:right;}
.int input { padding:1px 1px; border:1px solid #ccc;height:16px;}
.sub { padding-left:100px;}
.sub input { margin-right:10px; }
.formtips{width: 200px;margin:2px;padding:2px;}
.onError{
    background:#FFE0E9 url(../img/reg3.gif) no-repeat 0 center;
    padding-left:25px;
}
.onSuccess{
    background:#E9FBEB url(../img/reg4.gif) no-repeat 0 center;
    padding-left:25px;
}
.high{
    color:red;
}

  div,span,p {
    width:140px;
    height:140px;
    margin:5px;
    background:#aaa;
    border:#000 1px solid;
    float:left;
    font-size:17px;
    font-family:Verdana;
  }
  div.mini {
    width:55px;
    height:55px;
    background-color: #aaa;
    font-size:12px;
  }
  div.hide {
    display:none;
  }

table        { border:0;border-collapse:collapse;}
td    { font:normal 12px/17px Arial;padding:2px;width:100px;}
th            { font:bold 12px/17px Arial;text-align:left;padding:4px;border-bottom:1px solid #333;}
.even        { background:#FFF38F;}  /* 偶数行样式*/
.odd        { background:#FFFFEE;}  /* 奇数行样式*/
.selected        { background:#FF6500;color:#fff;}

js代码

<head>
        <meta charset="UTF-8">
        <title>基本选择器</title>
        <<link rel="stylesheet" type="text/css" href="../../css/style.css"/>
        <script src="../../js/jquery-1.8.3.js"></script>
        <script>
            $(function(){
                $("#btn1").click(function(){
                    $("#one").css("background-color","pink");
                });

                $("#btn2").click(function(){
                    $(".mini").css("background-color","pink");
                })

                $("#btn3").click(function(){
                    $("div").css("background-color","pink");
                })

                $("#btn4").click(function(){
                    $("*").css("background-color","pink")
                })

                $("#btn5").click(function(){
                    $("#two,mini").css("background-color","pink")
                })
            })
        </script>
    </head>