705 ILCS 25/8.1

In all cases, other than those appealable directly to the Supreme Court as provided by Section 4 of Article VI of the Constitution or by rule of the Supreme Court, appeals from final judgments of a circuit court lie as a matter of right to the appellate court in the district in which the circuit court is located, except that after a trial on the merits in a criminal case, no appeal shall lie from a judgment of acquittal.

The appellate court may exercise such original jurisdiction as may be necessary to the complete determination of any cause on review.