function apri(nomeLayer) { 

// IE + VERSIONI DI NETSCAPE PIU' ODIERNE (6,7 ...)
if (document.getElementById) {
  x = document.body.clientWidth; 

if (nomeLayer=="fiera"){ xf=10; xm=467;}
if (nomeLayer=="calendario"){ xf=149; xm=330;}
if (nomeLayer=="messe"){ xf=277; xm=200;}
if (nomeLayer=="areaespo"){ xf=388; xm=89;}
if (nomeLayer=="mehr"){ xf=465; xm=13;}
if (nomeLayer=="press"){ xf=597; xm=-120;}


if (x <= 1000){document.getElementById(nomeLayer).style.left = xf;}
 else {posizionex = (x/2);
  document.getElementById(nomeLayer).style.left = posizionex - xm;}
  document.getElementById(nomeLayer).style.visibility = 'visible';
  }

// VERSIONI DATATE DI NETSCAPE (4,4.5 ....)

if (document.layers) {

x = self.innerWidth;
if (nomeLayer=="fiera"){ xf=xf; xm=xm+9;}
if (nomeLayer=="calendario"){ xf=xf; xm=xm+9;}
if (nomeLayer=="servizi"){ xf=xf; xm=xm+9;}
if (nomeLayer=="areaespo"){ xf=xf; xm=xm+9;}
if (nomeLayer=="info"){ xf=xf; xm=xm+9;}
if (nomeLayer=="press"){ xf=xf; xm=xm+9;}

if (x <= 1000){document.layers[nomeLayer].left = xf;}
 else {posizionex = (x/2);
  document.layers[nomeLayer].left  = (posizionex - xm);
  }
 document.layers[nomeLayer].visibility = 'visible';
}
 
}
// FINE CODICE NETSCAPE  
 
function chiudi(nomeLayer) { 
if (document.all) { 
 document.all[nomeLayer].style.visibility = 'hidden'; 
} 
else if (document.getElementById) { 
 document.getElementById(nomeLayer).style.visibility = 'hidden'; 
} 
else if (document.layers) { 
 document.layers[nomeLayer].visibility = "hidden"; 
} 
}