How to redirect the page to home after alert message in APEX

Question

Hi All,
I have 4 tab and home page APEX report in that home page I have organization to select as parameter for all the page which is mandatory column so without select the organization in home page I can move to other 4 page but some time users directly pressing the tab for this I have create the ORG_ALERT in each 4 page which this we are able to see the pop-up message when we directly hitting on tab but after select the OK to alert message the page is run for long time and it show all the organization data which I don't want so how can I modify the alert so that after pop-up message it will go to home page.
Declare Output VARCHAR2 (20);
begin 
Output := 1;
Output := NVL( :AI_ORGANIZATION_ID , 0);
IF Output  = '0'  THEN
   APEX_UTIL.SET_SESSION_STATE('AI_ORGANIZATION_CODE','');
   HTP.p ('<script type="text/javascript">');
   HTP.p ('alert("No Organization selected.\n Please select an Organization");' );
   HTP.p ('</script>');  
END IF; 
END;
Regards,
Sushant

Answer 1

Hi Kiran,
I have created two process -- On Load - After Header
1)  Sequence=10
Declare Output VARCHAR2 (20);
begin
Output := 1;
Output := NVL( :AI_ORGANIZATION_ID , 0);
IF Output  = '0'  THEN
   APEX_UTIL.SET_SESSION_STATE('AI_ORGANIZATION_CODE','');
   HTP.p ('<script type="text/javascript">');
   HTP.p ('alert("No Organization selected.\n Please select an Organization");' );
   HTP.p ('</script>'); 
END IF;
END;
2) Sequence=20
Declare Output VARCHAR2 (20);
begin 
Output := 1;
Output := NVL( :AI_ORGANIZATION_ID , 0);
IF Output  = '0'  THEN
   htp.init;
    owa_util.redirect_url('f?p=&APP_ID.:1:&APP_SESSION.');
ELSE
htp.init;
owa_util.redirect_url('f?p=&APP_ID.:4:&APP_SESSION.');
END IF;
  END;
but after click on tab directly it is not showing the pop-up message and directly going to home page. I want when I click on pop-up message to OK then it need to redirect the home page also from home page when I am selecting any organization and trying to go on tab it is not going maybe due to owa_util.redirect_url. Please advise.
Regards,
Sushant