function apri_fin(nomefile,nomefin,largh,altez) {

   largh = largh + 20 
   altez = altez + 20

   config='toolbar=no,location=no,directories=no,status=no,menubar=no,width=' + largh  + ',height=' + altez 
   config += ',scrollbars=no,resizable=no'

   pop = window.open (nomefile,nomefin,config)
   pop.moveTo((screen.Width/2) - (largh/2), (screen.Height/2)- (altez/2));
   pop.focus()

}




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