通过css实现样式精美的圆角风格下拉菜单，可根据自己网站的颜色布局等自己修改样式即可套用。
<!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=gb2312">
<meta name="keywords" content="武鸣人网站,武鸣信息网,武鸣本地网,武鸣信息资源平台,减肥,健身,励志,励志语录,js特效,网页特效,www.wuming.ren">
<meta name="description" content="欢迎来到武鸣人信息资源平台，各种信息免费发布，资源共享合作共赢，分享互联网流行的励志语录经典短句，减肥健身健康小常识及打卡记录，收集各种js特效代码。">
<title>三款精美js下拉菜单样式分享_武鸣人</title>
<style type="text/css">
<!--
body{background:#CFDFEF;font:12px/150% "Lucida Grande", Arial, Verdana, Helvetica, sans-serif;}
#uboxstyle .select_box{width:100px;height:24px;}
#macstyle .select_box{width:91px;height:24px;}
#tm2008style .select_box{width:102px;height:24px;}
#uboxstyle div.tag_select{display:block;color:#79A2BD;width:80px;height:24px;background:transparent url("/img/20240321_www_wuming_ren_9.gif") no-repeat 0 0;padding:0 10px;line-height:24px;}
#uboxstyle div.tag_select_hover{display:block;color:#79A2BD;width:80px;height:24px;background:transparent url("/img/20240321_www_wuming_ren_9.gif") no-repeat 0 -24px;padding:0 10px;line-height:24px;}
#uboxstyle div.tag_select_open{display:block;color:#79A2BD;width:80px;height:24px;background:transparent url("/img/20240321_www_wuming_ren_9.gif") no-repeat 0 -48px;padding:0 10px;line-height:24px;}
#uboxstyle ul.tag_options{position:absolute;padding:0;margin:0;list-style:none;background:transparent url("/img/20240321_www_wuming_ren_9.gif") no-repeat right bottom;width:100px;padding:0 0 5px;margin:0;}
#uboxstyle ul.tag_options li{background:transparent url("/img/20240321_www_wuming_ren_9.gif") repeat-y -100px 0;display:block;width:80px;padding:0 10px;height:24px;text-decoration:none;line-height:24px;color:#79A2BD;}
#uboxstyle ul.tag_options li.open_hover{background:transparent url("/img/20240321_www_wuming_ren_9.gif") no-repeat 0 -72px;color:#fff}
#uboxstyle ul.tag_options li.open_selected{background:transparent url("/img/20240321_www_wuming_ren_9.gif") no-repeat 0 -96px;color:#fff}
#macstyle div.tag_select{display:block;color:#000;width:71px;height:24px;background:transparent url("/img/20240321_www_wuming_ren_10.gif") no-repeat 0 -24px;padding:0 10px;line-height:24px;}
#macstyle div.tag_select_hover{display:block;color:#000;width:71px;height:24px;background:transparent url("/img/20240321_www_wuming_ren_10.gif") no-repeat 0 0;padding:0 10px;line-height:24px;}
#macstyle div.tag_select_open{display:block;color:#000;width:71px;height:24px;background:transparent url("/img/20240321_www_wuming_ren_10.gif") no-repeat 0 -48px;padding:0 10px;line-height:24px;}
#macstyle ul.tag_options{position:absolute;margin:-4px 0 0;list-style:none;background:transparent url("/img/20240321_www_wuming_ren_10.gif") no-repeat left bottom;width:100px;padding:0 0 5px;margin:0;width:71px;}
#macstyle ul.tag_options li{background:transparent url("/img/20240321_www_wuming_ren_10.gif") repeat-y -91px 0;display:block;width:61px;padding:0 0 0 10px;height:24px;text-decoration:none;line-height:24px;color:#000;}
#macstyle ul.tag_options li.open_hover{background:transparent url("/img/20240321_www_wuming_ren_10.gif") no-repeat -162px 0;color:#000}
#macstyle ul.tag_options li.open_selected{background:transparent url("/img/20240321_www_wuming_ren_10.gif") no-repeat -162px -24px;color:#fff}
#tm2008style div.tag_select{display:block;color:#000;width:82px;height:22px;background:transparent url("/img/20240321_www_wuming_ren_11.gif") no-repeat 0 0;padding:0 10px;line-height:22px;}
#tm2008style div.tag_select_hover{display:block;color:#000;width:82px;height:22px;background:transparent url("/img/20240321_www_wuming_ren_11.gif") no-repeat 0 -22px;padding:0 10px;line-height:22px;}
#tm2008style div.tag_select_open{display:block;color:#000;width:82px;height:22px;background:transparent url("/img/20240321_www_wuming_ren_11.gif") no-repeat 0 -44px;padding:0 10px;line-height:22px;}
#tm2008style ul.tag_options{position:absolute;margin:0;list-style:none;background:transparent url("/img/20240321_www_wuming_ren_11.gif") no-repeat left bottom;width:100px;padding:0 0 1px;margin:0;width:80px;}
#tm2008style ul.tag_options li{background:transparent url("/img/20240321_www_wuming_ren_11.gif") repeat-y -102px 0;display:block;width:61px;padding:0 10px;height:22px;text-decoration:none;line-height:22px;color:#000;}
#tm2008style ul.tag_options li.open_hover{background:transparent url("/img/20240321_www_wuming_ren_11.gif") no-repeat 0 -88px;color:#000}
#tm2008style ul.tag_options li.open_selected{background:transparent url("/img/20240321_www_wuming_ren_11.gif") no-repeat 0 -66px;color:#19555F}
-->
</style>
<script type="text/javascript">
/*#############################################################
Name: Select to CSS
Version: 0.2
Author: Utom
#############################################################*/
var selects = document.getElementsByTagName('select');
var isIE = (document.all && window.ActiveXObject && !window.opera) ? true : false;
function $(id) {
return document.getElementById(id);
}
function stopBubbling (ev) {
ev.stopPropagation();
}
function rSelects() {
for (i=0;i<selects.length;i++){
selects[i].style.display = 'none';
select_tag = document.createElement('div');
select_tag.id = 'select_' + selects[i].name;
select_tag.className = 'select_box';
selects[i].parentNode.insertBefore(select_tag,selects[i]);
select_info = document.createElement('div');
select_info.id = 'select_info_' + selects[i].name;
select_info.className='tag_select';
select_info.style.cursor='pointer';
select_tag.appendChild(select_info);
select_ul = document.createElement('ul');
select_ul.id = 'options_' + selects[i].name;
select_ul.className = 'tag_options';
select_ul.style.position='absolute';
select_ul.style.display='none';
select_ul.style.zIndex='999';
select_tag.appendChild(select_ul);
rOptions(i,selects[i].name);
mouseSelects(selects[i].name);
if (isIE){
selects[i].onclick = new Function("clickLabels3('"+selects[i].name+"');window.event.cancelBubble = true;");
}
else if(!isIE){
selects[i].onclick = new Function("clickLabels3('"+selects[i].name+"')");
selects[i].addEventListener("click", stopBubbling, false);
}
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
function rOptions(i, name) {
var options = selects[i].getElementsByTagName('option');
var options_ul = 'options_' + name;
for (n=0;n<selects[i].options.length;n++){
option_li = document.createElement('li');
option_li.style.cursor='pointer';
option_li.className='open';
$(options_ul).appendChild(option_li);
option_text = document.createTextNode(selects[i].options[n].text);
option_li.appendChild(option_text);
option_selected = selects[i].options[n].selected;
if(option_selected){
option_li.className='open_selected';
option_li.id='selected_' + name;
$('select_info_' + name).appendChild(document.createTextNode(option_li.innerHTML));
}
option_li.onmouseover = function(){this.className='open_hover';}
option_li.onmouseout = function(){
if(this.id=='selected_' + name){
this.className='open_selected';
}
else {
this.className='open';
}
}
option_li.onclick = new Function("clickOptions("+i+","+n+",'"+selects[i].name+"')");
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
function mouseSelects(name){
var sincn = 'select_info_' + name;
$(sincn).onmouseover = function(){ if(this.className=='tag_select') this.className='tag_select_hover'; }
$(sincn).onmouseout = function(){ if(this.className=='tag_select_hover') this.className='tag_select'; }
if (isIE){
$(sincn).onclick = new Function("clickSelects('"+name+"');window.event.cancelBubble = true;");
}
else if(!isIE){
$(sincn).onclick = new Function("clickSelects('"+name+"');");
$('select_info_' +name).addEventListener("click", stopBubbling, false);
}
}
function clickSelects(name){
var sincn = 'select_info_' + name;
var sinul = 'options_' + name;
for (i=0;i<selects.length;i++){
if(selects[i].name == name){
if( $(sincn).className =='tag_select_hover'){
$(sincn).className ='tag_select_open';
$(sinul).style.display = '';
}
else if( $(sincn).className =='tag_select_open'){
$(sincn).className = 'tag_select_hover';
$(sinul).style.display = 'none';
}
}
else{
$('select_info_' + selects[i].name).className = 'tag_select';
$('options_' + selects[i].name).style.display = 'none';
}
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
function clickOptions(i, n, name){
var li = $('options_' + name).getElementsByTagName('li');
$('selected_' + name).className='open';
$('selected_' + name).id='';
li[n].id='selected_' + name;
li[n].className='open_hover';
$('select_' + name).removeChild($('select_info_' + name));
select_info = document.createElement('div');
select_info.id = 'select_info_' + name;
select_info.className='tag_select';
select_info.style.cursor='pointer';
$('options_' + name).parentNode.insertBefore(select_info,$('options_' + name));
mouseSelects(name);
$('select_info_' + name).appendChild(document.createTextNode(li[n].innerHTML));
$( 'options_' + name ).style.display = 'none' ;
$( 'select_info_' + name ).className = 'tag_select';
selects[i].options[n].selected = 'selected';
}
window.onload = function(e) {
bodyclick = document.getElementsByTagName('body').item(0);
rSelects();
bodyclick.onclick = function(){
for (i=0;i<selects.length;i++){
$('select_info_' + selects[i].name).className = 'tag_select';
$('options_' + selects[i].name).style.display = 'none';
}
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
</script>
</head>
<body>
<a href="https://www.wuming.ren">武鸣人</a>，各种信息资源免费发布，分享励志语录经典短句，减肥健身常识，各种js特效代码。网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)<hr>
<!--欢迎来到武鸣人信息资源平台，各种信息免费发布，资源共享合作共赢，分享互联网流行的励志语录经典短句，减肥健身健康小常识及打卡记录，收集各种js特效代码。-->
<script type="text/javascript" src="https://www.wuming.ren/ad/tc.js"></script>
<script type="text/javascript" src="https://www.wuming.ren/ad/a.js"></script>
<form id="form" name="form" method="post" action="">
<div id="uboxstyle">
<h3 style="color:#6D93AB;font-size:14px;">U-Box Style</h3>
<select name="language" id="language">
<option value="English" selected="selected">English</option>
<option value="简体中文">简体中文</option>
<option value="日本語">日本語</option>
<option value="Deutsch">Deutsch</option>
<option value="wuming.ren">wuming.ren</option>
<option value="wuming.ren">wuming.ren</option>
<option value="Italiano">Italiano</option>
<option value="Polski">Polski</option>
<option value="wuming.ren">wuming.ren</option>
<option value="Svenska">Svenska</option>
<option value="wuming.ren">wuming.ren</option>
<option value="wuming.ren">wuming.ren</option>
</select>
</div>
<br /><br />
<h3 style="color:#6D93AB;font-size:14px;">Mac Style</h3>
<div id="macstyle">
<select name="language_mac" id="language_mac">
<option value="English" selected="selected">English</option>
<option value="简体中文">简体中文</option>
<option value="日本語">日本語</option>
<option value="Deutsch">Deutsch</option>
<option value="wuming.ren">wuming.ren</option>
<option value="wuming.ren">wuming.ren</option>
<option value="Italiano">Italiano</option>
<option value="Polski">Polski</option>
<option value="wuming.ren">wuming.ren</option>
<option value="Svenska">Svenska</option>
<option value="wuming.ren">wuming.ren</option>
<option value="wuming.ren">wuming.ren</option>
</select>
</div>
<br /><br />
<h3 style="color:#6D93AB;font-size:14px;">TM2008 Style</h3>
<div id="tm2008style">
<select name="language_tm2008" id="language_tm2008">
<option value="English">English</option>
<option value="简体中文">简体中文</option>
<option value="日本語">日本語</option>
<option value="Deutsch">Deutsch</option>
<option value="wuming.ren">wuming.ren</option>
<option value="wuming.ren">wuming.ren</option>
<option value="Italiano">Italiano</option>
<option value="Polski">Polski</option>
<option value="wuming.ren">wuming.ren</option>
<option value="Svenska">Svenska</option>
<option value="wuming.ren">wuming.ren</option>
<option value="wuming.ren">wuming.ren</option>
</select>
</div>
</form>
</body>
</html>