Are there any option I can set to filter filename in the file dialog box?

 

Example: 

Primary Filename:  JoeSmith.brw
Associated files are: JoeSmith.cb1, JoeSmith.cb2, JoeSmith.ecg, and etc....

We won't know how many assoicated files are included during the upload.  Therefore if it has a validateoption that can pre-filter the filename in the file dialog box that would be a great.

Thanks,

Bo Ching