function PopUp(address,x,y){
	largh=x;
	altez=y;
	stringa='top='+((screen.height-altez)/2)+',left='+((screen.width-largh)/2)+',width='+largh+',height='+altez;
	try {
		finestra=window.open(address,"PopUp",stringa);
		finestra.focus();
	} catch(err) {
	
	}
}