经过美化的下拉框，当用户的鼠标经过时显示背景颜色，根据自己的需求来自定义。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.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>js+css设计美化蓝色下拉菜单效果_武鸣人</title>
<style type="text/css">
<!--
body
{
margin: 0px;
padding: 30px 0px 0px 30px;
background-color: #CFDFEF;
font-size: 12px;
}
.selectA
{
width: 92px;
height: 17px;
padding-left: 10px;
padding-top: 5px;
background-image: url(/img/20240325_www_wuming_ren_1.gif);
overflow: hidden;
cursor: pointer;
}
.selectB
{
display: none;
width: 81px;
height: auto;
background-image: url(/img/20240325_www_wuming_ren_1.gif);
background-position: -102px 0px;
border-bottom: 1px solid #4EA0D1;
}
.selectB .item
{
width: 71px;
height: 17px;
background-image: url(/img/20240325_www_wuming_ren_1.gif);
background-position: -102px 0px;
padding-left: 10px;
padding-top: 5px;
overflow: hidden;
cursor: pointer;
}
-->
</style>
<script type="text/javascript">
<!--
//val
var items = null;
var selectA = null;
var selectB = null;
var selectAClicked = false;
//method
function $(s)
{//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
return document.getElementById(s);
}
window.onload = function()
{
items = [$("itemA"),$("itemB"),$("itemC"),$("itemD"),$("itemE"),$("itemF"),$("itemG"),$("itemH")];
selectA = $("selectA");
selectB = $("selectB");
//init
items[0].style.backgroundPosition = "0px -66px";
//selectA event
selectA.onmouseover = function()
{
if(selectAClicked)
return;
this.style.backgroundPosition = "0px -22px";
}
selectA.onmouseout = function()
{
if(selectAClicked)
return;
this.style.backgroundPosition = "0px 0px";
}
selectA.onclick = function()
{
if(selectAClicked)
{
selectAClicked = false;
this.style.backgroundPosition = "0px -22px";
selectB.style.display = "none";
return;
}
selectAClicked = true;
this.style.backgroundPosition = "0px -44px";
selectB.style.display = "block";
}//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)
//selectB event
//none
//items event
function itemMouseOver()
{
this.style.backgroundPosition = "0px -88px";
}
function itemMouseOut()
{
if(this.innerHTML == selectA.innerHTML)
{
this.style.backgroundPosition = "0px -66px";
return;
}
this.style.backgroundPosition = "-102px 0px";
}
function itemClick()
{
for(var i=0,length=items.length;i<length;i++)
items[i].style.backgroundPosition = "-102px 0px";
this.style.backgroundPosition = "0px -66px";
selectA.innerHTML = this.innerHTML;
selectB.style.display = "none";
selectA.style.backgroundPosition = "0px 0px";
selectAClicked = false;
}
for(var i=0,length=items.length;i<length;i++)
{
items[i].onmouseover = itemMouseOver;
items[i].onmouseout = itemMouseOut;
items[i].onclick = itemClick;
}
}//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>
<div id="selectA" class="selectA">武鸣人号</div>
<div id="selectB" class="selectB">
<div id="itemA" class="item">武鸣人一</div>
<div id="itemB" class="item">武鸣人二</div>
<div id="itemC" class="item">武鸣人三</div>
<div id="itemD" class="item">武鸣人四</div>
<div id="itemE" class="item">武鸣人五</div>
<div id="itemF" class="item">武鸣人六</div>
<div id="itemG" class="item">武鸣人七</div>
<div id="itemH" class="item">武鸣人八</div>
</div>
</body>
</html>