Example follows. In the case of CSV data replace the End of Field Tab with Comma. I got this by using the interactive text import preview on the specified file and copied the Source script embedded in the resulting JMP file. I removed the specific reference to the number of columns to allow the script to work with any number of columns.
Open(
"C:\Program Files (x86)\SAS\JMP\9\Support Files English\Sample Import Data\Animals_L.txt",
Import Settings(
End Of Line( CRLF, CR, LF ),
End Of Field( Tab ),
Strip Quotes( 1 ),
Use Apostrophe as Quotation Mark( 0 ),
Scan Whole File( 1 ),
Treat empty columns as numeric( 0 ),
Labels( 0 ),
Column Names Start( 1 ),
Data Starts( 1 ),
Lines To Read( 1 ),
Year Rule( "10-90" )
)
)