Edit in JSFiddle

body{
    background-color:#999;
}

.box{
    padding:20px;
    margin:40px;
    background: #dddddd;
    background: -webkit-linear-gradient(top,  #dddddd 0%,#cccccc 50%,#eeeeee 51%,#cccccc 100%);
    background: -moz-linear-gradient(top,  #dddddd 0%, #cccccc 50%, #eeeeee 51%, #cccccc 100%);
    background: -ms-linear-gradient(top,  #dddddd 0%,#cccccc 50%,#eeeeee 51%,#cccccc 100%);
    background: -o-linear-gradient(top,  #dddddd 0%,#cccccc 50%,#eeeeee 51%,#cccccc 100%);
    background: linear-gradient(to bottom,  #dddddd 0%,#cccccc 50%,#eeeeee 51%,#cccccc 100%);
    border-radius: 10px;
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border: 1px solid #eee;
    border-top: 1px solid #ffffff;
    text-shadow: 1px 1px 1px #eee;
    -moz-box-shadow: 0 1px 3px black;
    -webkit-box-shadow: 0 1px 3px black;
    box-shadow: 0 1px 3px black;
}

<div class="box">
    よく有り気なグラデーション入れてみたり...ってこれはボタンに多いかな
</div>