function chooseDB(objForm)
     {
          if(objForm.keywords.value>0&&objForm.keywords.value<21035)
               objForm.dbname.value="db1.txt"
          else if(objForm.keywords.value>21034&&objForm.keywords.value<39123)
               objForm.dbname.value="db2.txt"
          else if(objForm.keywords.value>39122&&objForm.keywords.value<58202)
               objForm.dbname.value="db3.txt"
          else if(objForm.keywords.value>58201&&objForm.keywords.value<77397)
               objForm.dbname.value="db4.txt"
          else if(objForm.keywords.value>77396&&objForm.keywords.value<90265)
               objForm.dbname.value="db5.txt"
	else if(objForm.keywords.value>90264&&objForm.keywords.value<99930)
               objForm.dbname.value="db5a.txt"
	
     }