'; if($byPeriod==yes){ echo '
Time period
'; echo '
Begin Time
'; echo '
End Time
'; } if($byNumber==yes){ echo '
Student Numbers
'; echo '
Lower limit
'; echo '
Upper limit
'; } if($byWork==yes){ echo '
Work
'; echo '
Work name
'; } if($byAssistant==yes){ echo '
Assistant
'; echo '
Assistant name
'; } if($byGrade==yes){ echo '
Grades
'; echo '
Lower limit
'; echo '
Upper limit
6=Approved
'; } $query=$query.' (date!=NULL))'; if($byPeriod==yes || $byNumber==yes || $byWork==yes || $byAssistant==yes || $byGrade==yes){ echo '
'; echo '
'; } else echo '
At least one option must be selected
'; echo "
"; } else{ echo 'This service demands valid
authentication
.'; } ?>