【js】js 获取文件大小 

<HTML>


<head>
 <title>js获取文件大小</title>
 <meta  http-equiv="content-type" content="text/html;charset=utf-8" >
 <script type="text/javascript">
       var flag = true;

var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
 function fileChange(target) {

   var fileSize = 0;

   if (isIE && !target.files) {

      var filePath = target.value;

      var fileSystem = new ActiveXObject("Scripting.FileSystemObject");

      var file = fileSystem.GetFile (filePath);

      fileSize = file.Size;

   } else {

      fileSize = target.files[0].size;

   }

   var size = fileSize / 1024/1024;
   
   if (size>1.5){
      alert("文件尺寸过大");
      flag = false;
   }
   
   alert(flag);

}    





 </script>
</head>

 <body>

    <input type="file" id="oFile" onchange="fileChange(this);" >

    <input  type="button" value="获取文件大小"  onclick="testFileSize();">

 </body>



<HTML>

 

posted @ 2014-12-09 14:29  snow__wolf  阅读(530)  评论(0)    收藏  举报