AN MD80 CREW ON THE LAX SEAVU ONE ARR WAS GIVEN TWO RWY CHANGES AND BECAME DISTRACTED; CAUSING THE ACFT TO BE HIGH AT THE DECOR INTXN.

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WE WERE ON THE SEAVU ONE ARR TO LAX. THIS WAS THE FIRST TIME I HAD EVER FLOWN THIS PARTICULAR ARR BUT WE HAD REVIEWED AND BRIEFED THE ARR WITH AN ANTICIPATED LNDG ON RWY 25L AT LAX. WE WERE INITIALLY TOLD BY SOCAL TO EXPECT THE ILS RWY 25L BUT AT SOME POINT AFTER THE CATAW FIX; THAT WAS CHANGED TO FLY THE ILS RWY 24L. THE FO REPROGRAMMED THE FMS TO COMPLY AND SO FAR NO DIFFICULTIES OCCURRED. SOMEWHERE BETWEEN THE SEAVU FIX AND SHURL FIX WE WERE INSTRUCTED TO CHANGE TO THE ILS RWY 24R BECAUSE OF A RWY CLOSURE. I THINK WE WERE JUST MOMENTS BEFORE THE TURN AT SHURL WHEN WE GOT THAT CHANGE. THE FO AGAIN STARTED PROGRAMMING THE CHANGE WHILE I DIALED IN THE NEW LOCALIZER FREQ FOR RWY 24R. AT SOME POINT; I FORGOT TO CONTINUE THE DSCNT EARLY ENOUGH TO MEET THE ALT BLOCK OF 9800 FT TO 9000 FT MSL AT THE DECOR FIX. TO THE BEST I CAN RECALL WE WERE ABLE TO MEET ALL REMAINING RESTRICTIONS AND LANDED UNEVENTFULLY. THERE DID NOT APPEAR TO BE ANY TFC CONFLICTS AT THE TIME. IT SEEMS LIKE THE RAPID SUCCESSION OF RWY CHANGES COMBINED WITH THE CLOSENESS OF THE FIXES AT SHURL AND MINZA AND MY INABILITY TO LOCATE THE RESTRICTIONS OF THE NEW ILS QUICKLY ENOUGH MADE IT VERY DIFFICULT TO STAY RIGHT ON TOP OF THE SITUATION THE WAY I PREFER.