利用CSS實現按鈕效果(無圖片)

代碼及簡要分析:

<style type="text/css">
#menu {display:block; position:relative; background:#edebdc; width:112px;
padding:25px; border:1px solid #000; margin:0 auto;
}

.white {position:absolute; width:100px; height:20px; color:#fff; background:#fff;
border-top:1px solid #ffdc56; border-right:1px solid #957704; border-bottom:1px solid #937603;
border-left:1px solid #ffdc56;overflow:hidden; text-align:center;
}

.blackc {position:absolute; top:0; left:0; width:98px; height:18px; color:#000;
font-family:verdana; font-size:11px; font-weight:bold; overflow:hidden;
border-top:1px solid #ffd42e; border-right:1px solid #caa205; border-bottom:1px solid #c9a105;
border-left:1px solid #ffd42e; overflow:hidden; text-align:center; line-height:15px; background:#fc0;
}

.black {position:relative; top:0; left:0; width:102px; height:22px; border:1px solid #000;}

.cona {position:relative; top:0; left:0; width:105px; height:25px;
border-top:1px solid #d5d3ca; border-left:1px solid #d5d3ca; background:#f7f6ef;
}

.conb {position:relative; top:0; left:0; width:107px; height:27px;
border-top:1px solid #b8b7af; border-left:1px solid #b8b7af; background:#f7f6ef;}

.conc {position:relative; top:0; left:0; width:109px; height:29px;
border-top:1px solid #9c9b95; border-left:1px solid #9c9b95; background:#f7f6ef;}

.cond {position:relative; top:0; left:0; width:111px; height:31px;
border-top:1px solid #d5d3ca; border-left:1px solid #d5dc3a; background:#fff; margin-top:2px;
}

#menu a.switch:visited {text-decoration:none;}
#menu a.switch {color:#c00; text-decoration:none; position:absolute;}
#menu a.switch:hover {color:#c00; background:#edebdc; cursor:pointer;}
#menu a.switch:hover .white {position:absolute; width:100px; height:20px;
color:#fff; background:#fff; border-bottom:1px solid #ffdc56; border-left:1px solid #957704;
border-top:1px solid #937603; border-right:1px solid #ffdc56;overflow:hidden; text-align:center;
}
#menu a.switch:hover .blackc {position:absolute; top:0; left:0; width:98px;
height:18px; color:#000; font-size:11px; font-weight:bold; overflow:hidden;
border-bottom:1px solid #ffd42e; border-left:1px solid #caa205; border-top:1px solid #c9a105;
border-right:1px solid #ffd42e; overflow:hidden; text-align:center; line-height:17px; background:#eb0;}
</style>

<div id="menu">

<div class="cond">
<div class="conc">
<div class="conb">
<div class="cona">
<div class="black">
<a class="switch" href="#nogo"><span class="white"><span class="blackc" title="Item one">ITEM ONE</span></span></a>
</div>
</div>
</div>
</div>
</div>

<div class="cond"><div class="conc"><div class="conb"><div class="cona"><div class="black">
<a class="switch" href="#nogo"><span class="white"><span class="blackc" title="Item two">ITEM TWO</span></span></a>
</div></div></div></div></div>

<div class="cond"><div class="conc"><div class="conb"><div class="cona"><div class="black">
<a class="switch" href="#nogo"><span class="white"><span class="blackc" title="Item three">ITEM THREE</span></span></a>
</div></div></div></div></div>

<div class="cond"><div class="conc"><div class="conb"><div class="cona"><div class="black">
<a class="switch" href="#nogo"><span class="white"><span class="blackc" title="Item four">ITEM FOUR</span></span></a>
</div></div></div></div></div>

<div class="cond"><div class="conc"><div class="conb"><div class="cona"><div class="black">
<a class="switch" href="#nogo"><span class="white"><span class="blackc" title="Item five">ITEM FIVE</span></span></a>
</div></div></div></div></div>

</div>