@creece, I didnt know how to use the rows the user selected, thats why I added the client script haha

Your code is in S.S. 2.0, so as @creece said, use the submit button and use the post event to loop through the selected rows and pass them as parameters to the schedule script, you will need to create a task to call the schedule script. See the N/task module. Then redirect from your schedule script to your suitelet.