var win_assoc = null;
function open_assoc (url_fichier,nom_fen,larg,haut,decalGauche,decalHaut)
{
        if (win_assoc == null || win_assoc.closed)
        {
                win_assoc = open(url_fichier,nom_fen,"toolbar=NO,directories=NO,location=NO,menubar=NO,resizable=YES,scrollbars=YES,status=NO,alwaysRaised=yes top="+decalHaut+", left="+decalGauche+",width="+larg+",height="+haut);
	}
        else
        {
                win_assoc.close();
                win_assoc = open(url_fichier,nom_fen,"toolbar=NO,directories=NO,location=NO,menubar=NO,resizable=YES,scrollbars=YES,status=NO,alwaysRaised=yes top="+decalHaut+", left="+decalGauche+",width="+larg+",height="+haut);
        }

        win_assoc.focus();
        
        //Déplacement de la fenêtre car Netscape ne prend pas les paramètres top et left
	if( navigator.appName.indexOf("Netscape") >= 0 )
	{
	        win_assoc.moveTo(decalGauche,decalHaut);
	}
}