<!DOCTYPE html>
<html lang="en">
<head>
<title>jquery模拟select框</title>
<meta charset="utf-8">
<style>
body{padding:0;margin:0;font-size:12px;}
ul,li{list-style:none;padding:0;margin:0;}
#dropdown{width:186px; margin:100px auto; position:relative}
.input_select{width:150px; height:24px; line-height:24px; padding-left:4px; padding-right:30px; border:1px solid #a9c9e2; background:#e8f5fe url(arrow.gif) no-repeat rightright 4px; color:#807a62; }
#dropdown ul{width:184px; background:#e8f5fe; margin-top:2px; border:1px solid #a9c9e2; position:absolute; display:none}
#dropdown ul li{height:24px; line-height:24px; text-indent:10px}
#dropdown ul li a{display:block; height:24px; color:#807a62; text-decoration:none}
#dropdown ul li a:hover{background:#c6dbfc; color:#369}
#result{margin-top:10px;text-align:center}
</style>
<script type="text/javascript" src="http://jt.875.cn/js/jquery.js"></script>
<script type="text/javascript">
$(function(){
$(".input_select").click(function(){
var ul = $("#dropdown ul");
if(ul.css("display")=="none"){
ul.slideDown("fast");
}else{
ul.slideUp("fast");
}
});
$("#dropdown ul li a").click(function(){
var txt = $(this).text();
$(".input_select").val(txt);
var value = $(this).attr("rel");
$("#dropdown ul").hide();
$("#result").html("您选择了"+txt+"，值为："+value);
});
});
</script>
</head>
<body>
<div id="dropdown">
<input class="input_select" type="text" value="请选择城市"/>
<ul>
<li><a href="javascript:void(0);">北京</a></li>
<li><a href="javascript:void(0);">上海</a></li>
<li><a href="javascript:void(0);">武汉</a></li>
<li><a href="javascript:void(0);">广州</a></li>
</ul>
</div>
<div id="result"></div>
</body>
</html>
原文：http://www.cnblogs.com/ybingbing_1213/p/4201271.html