Cutting a surafce with a series of lines

Hi, I am sure there should be an easy way to do this but I can not figure it out. I have a a planner suraface and I would like to split the surface with a series of lines. Does anybody know how to do it?

The command is _Split. In a view perpendicular to the direction you want to cut, Call the command, select the surface, Enter, then the lines to use as splitters and Enter.