Bonjour tout le monde!

Je suis en train de faire une session Administration d'une base de données pour site internet.

Mon problème concerne la partie "Supprimer" de ma base de donnée.

Tout d'abord, j'ai un tableau qui repertorie l'ensemble des "artist" avec un lien "Delete" qui appelle une fonction "message()" en javascript qui demande confirmation de la suppression:

function message(id){
        var confirmation = confirm( "Are you sure to want delete this Artist?" );
      	if(confirmation){
      	  document.location.href = "deleteArtist.php?idArtist="+id ;
      	}
      }

if($_GET["idArtist"]){
            /*Recovery of the artist's id in the URL's adress*/
            $id_artist  = $_GET["idArtist"] ;
            
            $sql = "SELECT COUNT(*)
                    FROM
                      `item`
                    WHERE
                      artist_item = '$id_artist'";
            
            $result = mysql_query($sql)or die(mysql_error());
              
            $nb_item_artist = mysql_result($result,0);
            
            if($nb_item_artist != 0){
              echo"<script>confirm('Be careful! At least one item will be delete if you continue. Do you want really delete this artist?');</script>";
           
           if("VALEUR DE MON BOOLEAN A TRUE"){
                /*Delete request*/
                $sql = "  DELETE 
                          FROM 
                            `artist`
              	          WHERE 
                            id_artist = '$id_artist' ";
              	
                /*execution of request SQL*/
                $result = mysql_query($sql) ;
                
                /*Checking of the result*/
                if($result)
                {
                  echo"<script>alert('This artist is deleted!');</script>";
                  echo "<script>reloadWindows()</script>";
                  //echo("This artist is deleted!") ;
                }
                else
                {
                  echo"<script>alert('This artist is not deleted!');</script>";
                  echo "<script>reloadWindows()</script>";
                  //echo("This artist is not deleted!") ;
                }
              }
              else{
                echo "<script>reloadWindows()</script>";
              }
            }

Configuration: Windows XP
Internet Explorer 7.0