1、文法
<input name="myFile" type="file">
2、屬性（以下三個僅HTML5支援，因此存在相容性問題）
（1）multiple ：表示使用者是否可以選擇多個值。multiple只能用於type=file和type=email。
（2）accept：伺服器接受的檔案類型，否則將被忽略。
音頻/ *代表音效檔。僅HTML5支援
視頻/ *代表視頻檔案。僅HTML5支援
映像/ *表示影像檔。僅HTML5支援
（3）required：此屬性指定使用者在提交表單之前必須填寫一個值。
3、擷取上傳的檔案資訊
<!DOCTYPE html><html lang="zh"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>file multiple</title> </head> <body> <input type="file" multiple="multiple" id="test"> <p id='content'></p> <script type="text/javascript"> var test = document.getElementById('test'); test.addEventListener('change', function() { var t_files = this.files; var str = ''; for(var i = 0, len = t_files.length; i < len; i++) { console.log(t_files[i]); str += '<a href="javascript:void(0)">' + t_files[i].name + '</a><br/>'; }; document.getElementById('content').innerHTML = str; }, false); </script> </body></html>
顯示：
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