<style type="text/css">
*{ margin:0px auto; padding:0px}#xiala{ width:180px; height:33px; border:1px solid #999;text-align:center; line-height:33px; vertical-align:middle; }#xiala:hover{ cursor:pointer}#zi{width:180px; height:150px; border:1px solid #63C; border-top:0px; display:none}
.list{width:180px; height:33px; text-align:center; line-height:33px; vertical-align:middle; border-bottom:1px solid #63C; background-color:#CCC}
.list:hover{ cursor:pointer; background-color:#63C; color:white}</style>
</head>
<body>
<div style="width:700px; height:500px; margin-top:30px">
<div id="xiala" οnclick="Show()"></div>
<div id="zi"> <div class="list" οnclick="Xuan(this)">山东</div> <div class="list" οnclick="Xuan(this)">淄博</div> <div class="list" οnclick="Xuan(this)">张店</div> </div></div></body>
<script type="text/javascript">function Show(){ document.getElementById("zi").style.display="block";}function Xuan(ys){ var v = ys.innerText; document.getElementById("xiala").innerText = v; document.getElementById("zi").style.display="none";}</script></html>