Resistor Identification
This may be using the lettering system for resistors: http://www.engineeringtoolbox.com/resistors-value-letter-digit-code-d_1656.html

However, I also found a resistor with 100J in the part number that happened to be 10 ohms? http://www.mouser.com/ProductDetail/IRC-TT-Electronics/MHP20-100J/?qs=wRBQ8ZgBZ99bTLS2IzzmFw%3D%3D

The only way to be sure is to borrow a multimeter!