ajax莫名其妙的自动执行

chectionAction----------checkinid:4
Hibernate: select staff0_.sid as sid1_, staff0_.name as name1_, staff0_.department as department1_, staff0_.job as job1_, staff0_.sex as sex1_, staff0_.phone as phone1_, staff0_.education as education1_, staff0_.birthday as birthday1_, staff0_.nativeplace as nativepl9_1_, staff0_.nowplace as nowplace1_, staff0_.state as state1_, staff0_.identity as identity1_, staff0_.indate as indate1_, staff0_.outdate as outdate1_, staff0_.outreason as outreason1_, staff0_.photo as photo1_ from hotel.staff staff0_ where (sid=? )
Hibernate: select user0_.sid as sid0_2_, user0_.passwd as passwd0_2_, staff1_.sid as sid1_0_, staff1_.name as name1_0_, staff1_.department as department1_0_, staff1_.job as job1_0_, staff1_.sex as sex1_0_, staff1_.phone as phone1_0_, staff1_.education as education1_0_, staff1_.birthday as birthday1_0_, staff1_.nativeplace as nativepl9_1_0_, staff1_.nowplace as nowplace1_0_, staff1_.state as state1_0_, staff1_.identity as identity1_0_, staff1_.indate as indate1_0_, staff1_.outdate as outdate1_0_, staff1_.outreason as outreason1_0_, staff1_.photo as photo1_0_, user2_.sid as sid0_1_, user2_.passwd as passwd0_1_ from hotel.user user0_ left outer join hotel.staff staff1_ on user0_.sid=staff1_.sid left outer join hotel.user user2_ on staff1_.sid=user2_.sid where user0_.sid=?
-------date:Fri Apr 05 19:19:18 CST 2013
Hibernate: insert into hotel.check (sid, checkin, checkout, checked, late, leave, day, about, staff_sid) values (?, ?, ?, ?, ?, ?, ?, ?, ?)
chectionAction----------checkinid:0
Hibernate: select staff0_.sid as sid1_, staff0_.name as name1_, staff0_.department as department1_, staff0_.job as job1_, staff0_.sex as sex1_, staff0_.phone as phone1_, staff0_.education as education1_, staff0_.birthday as birthday1_, staff0_.nativeplace as nativepl9_1_, staff0_.nowplace as nowplace1_, staff0_.state as state1_, staff0_.identity as identity1_, staff0_.indate as indate1_, staff0_.outdate as outdate1_, staff0_.outreason as outreason1_, staff0_.photo as photo1_ from hotel.staff staff0_ where (sid=? )
-------date:Fri Apr 05 19:19:32 CST 2013

Hibernate: insert into hotel.check (sid, checkin, checkout, checked, late, leave, day, about, staff_sid) values (?, ?, ?, ?, ?, ?, ?, ?, ?)

其中-checkinid:4是我手动执行的，checkinid:0是放着的时候自动执行的