if(document.images) 
{
   gCurrentslideSmall=1;
   gCurrentslideBig=1;
   gMaxslides=1;

   gPrefissoGrande='';
   gPrefissoPiccolo='';
   gEstensione='';

   slide = new Array();
   thumb = new Array();

}

function InizializzaSlide( nrofoto, directoryImmagini, prefissoGrandi, prefissoPiccole, estensione )
{
   gMaxslides=nrofoto;
   gPrefissoGrande=prefissoGrandi;
   gPrefissoPiccolo=prefissoPiccole;
   gEstensione=estensione;

   for (var n=1;n<=gMaxslides;n++)
   {
      slide[n]=new Image(80,400);
      slide[n].src=directoryImmagini+prefissoGrandi+n+estensione;
   }
   for (var n=1;n<=gMaxslides;n++)
   {
      thumb[n]=new Image(80,80);
      thumb[n].src=directoryImmagini+prefissoPiccole+n+estensione;
   }

   document.getElementById('nomefotoPiccola').value = prefissoGrandi+'1'+estensione;
   document.getElementById('nomefotoGrande').value = prefissoGrandi+'1'+estensione;
}

function prevSlide() 
{
   if (document.images) 
   {
      gCurrentslideSmall--;
     if (gCurrentslideSmall<1) gCurrentslideSmall=gMaxslides;
     document.images['slide'].src=thumb[gCurrentslideSmall].src;
   }
   document.getElementById('nomefotoPiccola').value = gPrefissoGrande+gCurrentslideSmall+gEstensione;
}

function nextSlide() 
{
   if (document.images) 
   {
      gCurrentslideSmall++;
      if (gCurrentslideSmall>gMaxslides) gCurrentslideSmall=1;
      document.images['slide'].src=thumb[gCurrentslideSmall].src;
   }
   document.getElementById('nomefotoPiccola').value = gPrefissoGrande+gCurrentslideSmall+gEstensione;
}

function showFullSize()
{
   document.images['fullsize'].src=slide[gCurrentslideSmall].src;
   document.getElementById('nomefotoGrande').value = document.getElementById('nomefotoPiccola').value ;
}

function prevNextFullSlide( i, directoryImmagini, prefisso, estensione ) 
{ 
   if(document.images) 
   { 
      gCurrentslideBig=gCurrentslideBig+i; 
      if (gCurrentslideBig<1) gCurrentslideBig=gMaxslides; 
      if(gCurrentslideBig>gMaxslides) gCurrentslideBig=1; 
      document.images['fullsize'].src=slide[gCurrentslideBig].src; 
      document.getElementById('nomefotoGrande').value = prefisso+gCurrentslideBig+estensione;
   }
}