Update Confirmation

<?php
if(isset($_POST['upload'])){
	if($_FILES['file']['name'] == "") {
?>
<script type="text/javascript" >
alert("Please specify a file to upload.");
window.location = "uploadExam_part1.php";
</script>
<?php		
		}
	else {
		include "config.php";	
		$sel = "SELECT * from questionpart1";
		$result = mysql_query($sel);
		
		if(mysql_num_rows($result) > 0) {
?>
<script type="text/javascript">
		var check = confirm("Are you sure you want to replace the questions?");
		if(check) {
		  //i don't know what to do in here
		}
			else {
			//and in here		
			}
		
</script>
<?php
			}	


require_once('DB.php');



$data = array();



$db =& DB::connect("mysql://root@localhost/aptitude", array());

if (PEAR::isError($db)) { die($db->getMessage()); }


function add_person( $type, $question, $choice1, $choice2, $choice3, $choice4, $answer )

{

 global $data, $db;



 $sth = $db->prepare( "INSERT INTO questionpart1 VALUES(0, ?, ?, ?, ?, ?, ?, ? )" );

 $db->execute( $sth, array( $type, $question, $choice1, $choice2, $choice3, $choice4, $answer ) );



 $data []= array(
   'type' => $type,

   'question' =>$question,

   'choice1' => $choice1,

   'choice2' =>  $choice2,

   'choice3' =>  $choice3,

   'choice4' => $choice4,

   'answer' => $answer

 );

}



if ( $_FILES['file']['tmp_name'] )

{

 $dom = DOMDocument::load( $_FILES['file']['tmp_name'] );

 $rows = $dom->getElementsByTagName( 'Row' );

 $first_row = true;

 foreach ($rows as $row)

 {

   if ( !$first_row )

   {
     $type = "";

     $question = "";

     $choice1 = "";

     $choice2 = "";

     $choice3 = "";

     $choice4 = "";

     $answer = "";

      

     $index = 1;

     $cells = $row->getElementsByTagName( 'Cell' );

     foreach( $cells as $cell )

     {

       $ind = $cell->getAttribute( 'Index' );

       if ( $ind != null ) $index = $ind;


       if ( $index == 2 ) $type = $cell->nodeValue;

       if ( $index == 3 ) $question = $cell->nodeValue;

       if ( $index == 4 ) $choice1 = $cell->nodeValue;

       if ( $index == 5 ) $choice2 = $cell->nodeValue;

       if ( $index == 6 ) $choice3 = $cell->nodeValue;

       if ( $index == 7 ) $choice4 = $cell->nodeValue;

       if ( $index == 8 ) $answer = $cell->nodeValue;



       $index += 1;

     }

     add_person(  $type, $question, $choice1, $choice2, $choice3, $choice4, $answer  );

   }

   $first_row = false;

 }

}
}
}

?>