(1)    The number of jurors selected shall be prescribed in s. 756.06 (2) (a), unless a lesser number has been stipulated and approved under s. 972.02 (2) or the court orders that additional jurors be selected. That number, plus the number of peremptory challenges available to all the parties, shall be called initially and maintained in the jury box by calling others to replace jurors excused for cause until all jurors have been examined. The parties shall thereupon exercise in their order, the state beginning, the peremptory challenges available to them, and if any party declines to challenge, the challenge shall be made by the clerk by lot.

   (2)   A party may waive in advance any or all of its peremptory challenges and the number of jurors called pursuant to sub. (1) shall be reduced by this number.