Javascript randomizer for baseball positions

I'm a web designer with a good amount of knowledge in html and css. I have some js knowledge, mainly just basic site interaction. I teach my son's T-ball team and the league has asked me to make a tool on their website to randomly assign positions and batting order for the team. This needs to be random for every player but not repeating a position in the lineup or fielding position until everyone has been in all of them. I need it to make sure everyone has an equal amount of time in every spot.

The coach would go to the league website go to the lineup/position tool put in there team names and then a lineup and position assignments would be generated and could be saved as a pdf.

I need this to be saved so that the next week the players wouldn't get the same position or spot in the lineup.

I know this is a lot, whatever help I get would really be appreciated. Thank You!