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js中开关变量使用实例

效果图:

js中开关变量使用实例

代码如下:

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 <style>
 *{
 margin: 0;
 padding: 0;
 font-family: "微软雅黑";
 }
 #wrap{
 width: 400px;
 height: 500px;
 border: 1px solid #ccc;
 margin: 20px auto;
 position: relative;
 overflow: hidden;
 background: #f1f1f1;
 }
 #wrap a{
 width: 40px;
 height: 50px;
 background:rgba(0,0,0,.4);
 /*border: 1px solid #fff;*/
 position: absolute;
 top: 50%;
 margin-top: -25px;
 text-align: center;
 text-decoration: none;
 line-height: 50px;
 color: white;
 font-size: 30px;
 }
 #wrap a:hover{
 background:rgba(0,0,0,.9);
 }
 #prev{
 left: 10px;
 }
 #next{
 right: 10px;
 }
 #note,#span1{
 position: absolute;
 left: 0;
 width: 400px;
 height: 30px;
 line-height: 30px;
 text-align: center;
 color: white;
 background: rgba(0,0,0,.6);
 }
 #note{
 bottom: 0;
 }
 #span1{
 top: 0;
 }
 #img1{
 width: 400px;
 height: 500px;
 }
 section{
 width: 400px;
 height: 50px;
 margin: 30px auto 0;
 line-height: 50px;
 text-align: center;
 }
 section input{
 padding: 5px 15px;
 margin-right: 10px;
 }
 .pink{
 background: pink;
 color: white;
 }
 </style>
 </head>
 <script>
 window.onload=function(){
 var oPrev=document.getElementById('prev');
 var oNext=document.getElementById('next');
 var oNote=document.getElementById('note');
 var oSpan=document.getElementById('span1');
 var oImg=document.getElementById('img1');
 var arrURL=['https://timgsa.baidu.com/timg"button" value="循环播放" class="pink"/><input type="button" value="顺序播放" />
 </section>
 <div id="wrap">
 <a href="javascript:;" rel="external nofollow" rel="external nofollow" id="prev">&lt;</a>
 <a href="javascript:;" rel="external nofollow" rel="external nofollow" id="next">&gt;</a>
 <p id="note">图片文字加载中......</p>
 <span id="span1">数量正在计算中......</span>
 <img id="img1" />
 </div>
 </body>
</html>

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