封装添加事件监听程序

来源：互联网发布：网络策划推广公司编辑：程序博客网时间：2024/06/05 16:59

<!doctype html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <title>Document</title>
   <style>
   *{margin:0;padding:0;}
     .head{font-size:12px;padding:6px 0 0 10px;}
     #login_box{width:300px;height:150px;background:#eee;
     border:1px solid #ccc;position:absolute;left:50%;top:50%;margin-left:-150px;margin-top:-75px;display:none;}
     #login_box p{height:20px;border-bottom:1px solid #ccc;font-size:12px;padding:6px 0 0 5px;font-weight:bold;}
     #close{width:14px;height:14px;background:url(close.png) no-repeat;position:absolute;right:4px;top:6px;}
   </style>
   <script>
      window.onload=function(){
         var login_btn=document.getElementById('login'),
              login_box=document.getElementById('login_box'),
              close=document.getElementById('close');
         // 封装添加事件监听程序
        function addEvent(ele,type,hander){
          if(ele.addEventListener){
            ele.addEventListener(type,hander,false);
          }else if(ele.attachEvent){
            ele.attachEvent('on'+type,hander);
          }else{
             ele['on'+type]=hander;
          }
         }
        // 显示登录层函数
         function showLogin(){
             login_box.style.display='block';
         }
        // 隐藏登录层函数
        function hideLogin(){
          login_box.style.display='none';
        }
        //点击登录按钮显示登录层
        addEvent(login_btn,'click',showLogin);
        //点击关闭按钮隐藏登录层
        addEvent(close,'click',hideLogin);
      }
   </script>
</head>
<body>
   <div class="head">亲，您好！<input type="button" value="登录" id="login"></div>
   <div id="login_box">
       <p>用户登录</p><span id="close"></span>
   </div>
</body>
</html>

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