AN ACR WDB TAXIED ACROSS AN ACTIVE DEP RWY AT ORD.

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IT WAS THE CAPT'S FIRST TRIP TO CHICAGO O'HARE IN MANY YRS. THE SO WAS BOTH NEW TO THE COMPANY AND TO THE AIRPLANE. I HAD BEEN TO O'HARE MANY TIMES AND WAS BUSY TELLING THE CAPT AND SO WHAT THE CORRECT PROCS WERE FOR PUSHBACK AND TAXI. WE WERE DEPARTING FROM THE N END OF THE CONCOURSE AND AFTER PUSHBACK AND ENG START; WE WERE CLRED BY ORD GND CTL TO TAKE THE OUTER TO THE JOG FOR 9L. WE STARTED TAXIING AND I SHOWED THE CAPT THE WAY TO THE OUTER TXWY. THE RWYS ACTIVE ONLY FOR TKOF WERE 4L; 9L; AND 32L FROM THE T1 INTXN. WHEN IT WAS TIME TO CONTINUE ON THE OUTER TXWY; I INSTEAD GLANCED AT MY 20/9 ARPT DIAGRAM AND MISREAD WHERE THE JOG TXWY WAS. I THEN TOLD THE CAPT TO CONTINUE STRAIGHT AHEAD (ON THE 9L/27R PARALLEL TXWY) TO THE JOG AND 9L. THIS RESULTED IN US TAXIING ACROSS RWY 4L ON THE 9L/27R PARALLEL WITHOUT A CLRNC. AFTER WE PASSED 4L; GND CTL SAID 'ACR WDB; YOU WENT THE WRONG WAY. HOLD SHORT OF THE JOG AND CONTACT TWR.' NOTHING ELSE WAS SAID ABOUT THE MATTER BY TWR OR GND. SUPPLEMENTAL INFO FROM ACN 230220: WE WERE ON THE 'NEW SCENIC' TXWY AND CROSSED RWY 4L; TO THE JOG TXWY.