用js实现placeholder效果（兼容ie）

作者: blank的小粉er | 来源:发表于2017-07-20 14:16 被阅读0次

placeholder是h5的新特性，所以低浏览器不支持

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
    input {
       width: 436px;
       height: 32px;
       line-height: 32px;
       padding-left: 10px;
       color: #999;
     }
    </style>
</head>
<body>
<input type="text" value="图书满减"  id="myinput">
    <script>
        
// 表单默认效果
  function addListener(element,e,fn){ 
    if(element.addEventListener){ 
        element.addEventListener(e,fn,false); 
        } else { 
            element.attachEvent("on" + e,fn); 
        } 
    } 
    var myinput = document.getElementById("myinput"); 
    addListener(myinput,"click",function(){ 
        myinput.value = "";
        
        }) 
    addListener(myinput,"blur",function(){ 
        myinput.value = "图书满减";
        

    }) 
    </script>
</body>
</html>