原生JavaScript实现网页右下角固定广告弹窗

完整代码示例

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>右下角广告框效果</title>
</head>
<style type="text/css">
  #advbox{
    width: 400px;
    height: 300px;
    position: fixed;
    right: 0;
    bottom: 0;
  }
  .adv{
    width: 380px;
    height: 270px;
    border: 1px solid #a00;
    position: relative;
  }
  #icon{
    display: block;
    width: 24px;
    height: 24px;
    color: #0c0;
    font-size: 30px;
    font-weight: bolder;
    position: absolute;
    right: 2px;
    top: 2px;
    cursor: pointer;
  }
  #resetadv{
    width: 105px;
    height:20px;
    position: fixed;
    right: 25px;
    bottom: 15px;
    color: #fff;
    font-size: 20px;
    background-color: #333;
  }
  .hide{
    display: none;
  }
  .show{
    display: block;
  }
</style>
<body>
  <div id="advbox">
    <div class="adv">
    <img src="" alt="结合html5,这可以是一个gif,swf或者video">
    <span id="icon">X</span>
    </div>
  </div>
  <div id="resetadv">广告入口>></div>

<script type="text/javascript">
  (function(){
      //封装一下dom的id操作
      var $ = function(id){
        return document.getElementById(id);
      };
      //添加点击事件
      $("icon").onclick=function(){
        $("advbox").className = "hide";
      };
      $("resetadv").onmouseover=function(){
        $("advbox").className = "show";
      };
  })();
</script>  
</body>
</html>