Learn about the basic elements of a jury trial. The opening statement is intended to inform the jury in a jury trial, or the judge in a court trial, about the nature of the case and what you intend to prove.Most trials last 3-7 days, but some may go longer. Sec. 2. Use Notes for Courts. Use the eJuror link to access the application and respond to your summons. You will need your Juror ID number and date of birth to log in. The form is used to obtain information about you so that we can objectively determine whether you are qualified to serve as a juror in the court. Jurors serve in two kinds of cases, criminal and civil. In a criminal case, the plaintiff is a prosecutor who represents the State of California. Jury cases are either criminal or civil.