function ApriFinestra(str) { 

larg=550; 
alt=350; 


toptop=(screen.height/2)-(alt/2); 
leftleft=(screen.width/2)-(larg/2); 



searchWin = window.open(str,'','top='+toptop+',left='+leftleft+',width='+larg+',height='+alt+',scrollbars=no,status=no,location=no,toolbar=no'); 

}