原生js实现下拉框功能（支持键盘事件）

话不多说，请看代码：

 
 
 
 
 
 
 
 
 html{
 height:100%;
 }
 body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, textarea, p, blockquote, th, td {
 margin: 0;
 padding: 0
 }
 ol, ul {
 list-style: none
 }
 body{
 position: relative;
 min-height:100%;
 font-size:14px;
 font-family: Tahoma, Verdana,"Microsoft Yahei";
 color:#333;
 }
 a{
 text-decoration: none;
 color:#333;
 }
 .header{
 width: 960px;
 padding-top: 15px;
 margin: 0 auto;
 line-height: 30px;
 text-align: right;
 }
 .header a{
 margin: 0 5px;
 }
 .main{
 width:960px;
 margin: 50px auto 0;
 }
 .code{
 border:1px dashed #e2e2e2;
 padding:10px 5px;
 margin-bottom:25px;
 }
 pre {
 font-family: "Microsoft Yahei",Arial,Helvetica;
 white-space: pre-wrap;  
 white-space: -moz-pre-wrap;  
 white-space: -pre-wrap;  
 white-space: -o-pre-wrap;  
 word-wrap: break-word; 
 }
 .example{
 padding-top:40px;
 margin-bottom:90px;
 }
 .example .call{
 padding:18px 5px;
 background:#f0f5f8;
 }
 .example h2{
 padding-top:20px;
 margin-bottom:7px;
 }
 .example table {
 width:100%;
 table-layout:fixed;
 border-collapse: collapse;
 border-spacing: 0;
 border: 1px solid #cee1ee;
 border-left: 0;
 }
 .example thead {
 border-bottom: 1px solid #cee1ee;
 background-color: #e3eef8;
 }
 .example tr {
 line-height: 24px;
 font-size: 13px;
 }
 .example tr:nth-child(2n) {
 background-color: #f0f5f8;
 }
 .example tr th,.example tr td {
 border-left: 1px solid #cee1ee;
 word-break: break-all;
 word-wrap: break-word;
 padding:0 10px;
 font-weight: normal;
 }
 .example tr th {
 color: #555;
 padding-top: 2px;
 padding-bottom: 2px;
 text-align: left;
 }
 
 .select-container {
 width: 186px;
 margin: 80px 0;
 position: relative;
 z-index: 10000;
 }
 .select-container .select-pose {
 width: 150px;
 height: 24px;
 line-height: 24px;
 display: block;
 color: #807a62;
 cursor: pointer;
 font-style: normal;
 padding-left: 4px;
 padding-right: 30px;
 border: 1px solid #333333; 
 }
 .select-pose:before {
 content: '';
 position: absolute;
 right: 7px;
 bottom: 7px;
 width: 0;
 height: 0;
 border-width: 4px;
 border-style: solid;
 border-color: #888 transparent transparent transparent;
 transition: all 0.2s;
 -webkit-transition: all 0.2s;
 -moz-transition: all 0.2s;
 -o-transition: all 0.2s;
 -ms-transition: all 0.2s;
 transform-origin: 50% 25%;
 -ms-transform-origin: 50% 25%;
 -moz-transform-origin: 50% 25%;
 -webkit-transform-origin: 50% 25%;
 -o-transform-origin: 50% 25%;
 }
 .extended.select-pose:before {
 transform: rotate(180deg);
 -webkit-transform: rotate(180deg);
 -moz-transform: rotate(180deg);
 -o-transform: rotate(180deg);
 -ms-transform: rotate(180deg);
 }
 .select-container .select-content {
 width: 184px;
 border: 1px solid #333333;
 background-color: #ffffff;
 position: absolute;
 z-index: 20000;
 margin-top: -1px;
 display: none;
 overflow: hidden;
 }
 .select-list{
 cursor: pointer;
 height: 24px;
 line-height: 24px;
 padding-left: 10px;
 }
 
 


 
 项目地址
 返回首页
 
 
 
 请选择分类
 

 
选项一
 
选项二
 
选项三
 
选项四
 
 
 
 
 

 支持键盘事件,执行默认参数,鼠标点击分类显示,鼠标经过list执行默认参数
 
 
new select("#select1");
 
 
 
 调用方法：
 
new select(selector,{options});
 
 options参数
 

 

 

 
参数
 
默认值
 
说明
 
 
 

 

 
before
 
'#fff'
 
鼠标经过list初始化颜色色值
 
 

 
after
 
'#ccc'
 
鼠标经过list颜色色值
 
 
 
 
 

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