function apri(strpage,strname,w,h,s) {
 	var psTop=(screen.height-h)/2;
	var psLeft=(screen.width-w)/2;
	if (document.all) {
	    var opzioni='width='+w+','+'height='+h+',top='+psTop+',left='+psLeft+',toolbar=0,location=0,status=0,menubar=0,scrollbars='+s+',resizable=0';
 		var dialogo=window.open(strpage,strname,opzioni);
    } else {
		var opzioni='width='+w+',height='+h+',top='+psTop+',left='+psLeft+',toolbar=0,location=0,status=0,menubar=0,scrollbars='+s+',resizable=0';
		var dialogo=window.open('',strname,opzioni);
		dialogo.moveTo(psLeft,psTop);
		dialogo.location.href=strpage;
	}
	return false;
}