(?:file)?name=				# filename=/name= 
  (\"[^\"]+\.					# quoted filename.
	(?:vb[se]				# list of extns
	|ws[fh]
	|jse?
	|exe
	|com
	|shs
	|hta
	|bat)
	\"					# end quote
  |[\w.-]+\.					# unquoted filename.ext
	(?:vb[se]				# list of extns
	|ws[fh]
	|jse?
	|exe
	|com
	|shs
	|hta
	|bat)
  )						# end of filename capture