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  • javascript判断上传文件大小

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <title>Document</title>
    </head>
    <body>
        <input type="file" id="btnFile" />
    </body>
    </html>
    <script>
        var btn = document.getElementById('btnFile');
        btn.onchange = function(){
        getSize(this);
        function getSize(t){
            var size;
            if(t.files){
                size = parseInt( t.files[0].size / 1024 /1024,10);
            }else{
    
                size = parseInt( new ActiveXObject("Scripting.FileSystemObject").GetFile(t.value).size / 1024/1024,10 );
            }
            if( size >= 2){
                alert('文件过大');
            }
        };
    </script>
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  • 原文地址:https://www.cnblogs.com/fengzekun/p/4072798.html
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