nrsl=1;

sl = new Array();

for ( i=1;i<35;i++ )
 {
 if ( i<10 ) sl[i]="../img/pr/pr1_0"+i+".jpg"
  else sl[i]="../img/pr/pr1_"+i+".jpg";
 document.write( "<OPTION>Plansza nr "+i+"</OPTION>" );
 }
 
sla = new Array();

function kol( nz1,nazwa1,ok1,takok1,nieok1 )
 {
 document[nz1].src="../img/"+nazwa1+( ok1 ? takok1 : nieok1 )+".gif";
 }
 
function zmien( nr )
 {
 document.pp.lista.focus();
 if (( nr<1 )||( nr>34 )) return false;
 nrsl=nr;
 kol( 'wst',"_back",nr>1,"01","00" );
 kol( 'dal',"_forw",nr<34,"01","00" );
 document.pp.lista.selectedIndex=nr-1;
 if ( sl[nr]!="" )
  {
  sla[nr+1]=new Image();
  sla[nr+1].src=sl[nr];
  sl[nr]="";
  }
 document["slajd"].src=sla[nr+1].src;
 return false;
 }