<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>兼容IE6/IE7/IE8/火狐---下拉菜单select高度</title>
<style type="text/css">
.select{border:1px solid #ccc;line-height:22px;color:#666;margin:-1px;padding:4px 3px;font-size:13px;width:93px;*width:85px;}
.select_border{*background:#fff;*border:1px solid #ccc;*padding:4px;width:83px;}
.container{*border:0;*position:relative;*width:83px;*height:18px;*overflow:hidden;*background:#fff;}
</style>
</head>
<body>
<div class="select_border">
<div class="container">
<select name="" class="select">
<option selected="selected">区域不限</option>
<option>北京</option>
<option>天津</option>
<option>上海</option>
<option>重庆</option>
</select>
</div>
</div>
</body>
</html>
总结：用外部的DIV来实现高度 边框的兼容，缺点用到大量的hack，作为最后没有办法的选择