accept 屬性常用的文件類型：

For CSV files (.csv), use: <input type="file" accept=".csv" />For Excel Files 2003-2007 (.xls), use: <input type="file" accept="application/vnd.ms-excel" />For Excel Files 2010 (.xlsx), use: <input type="file" accept="application/vnd.openxmlformats-officedocument.sPReadsheetml.sheet" />For Text Files (.txt) use: <input type="file" accept="text/plain" />For Image Files (.png/.jpg/etc), use: <input type="file" accept="image/*" />For HTML Files (.htm,.html), use:<input type="file" accept="text/html" />For Video Files (.avi, .mpg, .mpeg, .mp4), use:<input type="file" accept="video/*" />For Audio Files (.mp3, .wav, etc), use:<input type="file" accept="audio/*" />For PDF Files, use:<input type="file" accept=".pdf" /> 例子：http://jsfiddle.net/dirtyd77/LzLcZ/144/