效果如下：
下载地址：带搜索框的jQuery下拉框美化插件 searchable
1 引入
<link href="jquery.searchableSelect.css" rel="stylesheet" type="text/css">
<script src="jquery-1.11.1.min.js"></script>
<script src="jquery.searchableSelect.js"></script>2 html页面
<select>
<option value="jQuery插件库">jQuery插件库</option>
<option value="BlackBerry">BlackBerry</option>
<option value="device">device</option>
<option value="with">with</option>
<option value="entertainment">entertainment</option>
<option value="and">and</option>
<option value="social">social</option>
<option value="networking">networking</option>
<option value="apps">apps</option>
<option value="or">or</option>
<option value="apps">apps</option>
<option value="that">that</option>
<option value="will">will</option>
<option value="boost">boost</option>
<option value="your">your</option>
<option value="productivity">productivity</option>
<option value="Download">Download</option>
<option value="or">or</option>
<option value="buy">buy</option>
<option value="apps">apps</option>
<option value="from">from</option>
<option value="Afbb">Afbb</option>
<option value="Akademie">Akademie</option>
<option value="Berlin">Berlin</option>
<option value="reviews">reviews</option>
<option value="by">by</option>
<option value="real">real</option>
</select>3 编写jquery脚本
$(function(){
$('select').searchableSelect();
});完整代码如下：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>带搜索框的jQuery下拉框美化插件 searchableSelect</title>
<link href="jquery.searchableSelect.css" rel="stylesheet" type="text/css">
<script src="jquery-1.11.1.min.js"></script>
<script src="jquery.searchableSelect.js"></script>
</head>
<body>
<select>
<option value="jQuery插件库">jQuery插件库</option>
<option value="BlackBerry">BlackBerry</option>
<option value="device">device</option>
<option value="with">with</option>
<option value="entertainment">entertainment</option>
<option value="and">and</option>
<option value="social">social</option>
<option value="networking">networking</option>
<option value="apps">apps</option>
<option value="or">or</option>
<option value="apps">apps</option>
<option value="that">that</option>
<option value="will">will</option>
<option value="boost">boost</option>
<option value="your">your</option>
<option value="productivity">productivity</option>
<option value="Download">Download</option>
<option value="or">or</option>
<option value="buy">buy</option>
<option value="apps">apps</option>
<option value="from">from</option>
<option value="Afbb">Afbb</option>
<option value="Akademie">Akademie</option>
<option value="Berlin">Berlin</option>
<option value="reviews">reviews</option>
<option value="by">by</option>
<option value="real">real</option>
</select>
<script>
$(function(){
$('select').searchableSelect();
});
</script>
</body>
</html>