Upload File Mime type

mime.txt

Well this is embarrassing... I found the solution I was looking for and it couldn't be simpler. I used the following code to get the desired result. Hope this helps someone in the future. Thanks everyone for your help.

<input id="fileSelect" type="file" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />  
Valid Accept Types:
For CSV files (.csv), use: 

<input type="file" accept=".csv" />
For Excel Files 97-2003 (.xls), use: 

<input type="file" accept="application/vnd.ms-excel" />
For Excel Files 2007+ (.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" /> 
DEMO:
http://jsfiddle.net/dirtyd77/LzLcZ/144/

NOTE:

If you are trying to display Excel CSV files (.csv), do NOT use:

text/csv
application/csv
text/comma-separated-values (works in Opera only).
If you are trying to display a particular file type (for example, a WAV or PDF), then this will almost always work...

 <input type="file" accept=".FILETYPE" />