function show_picture(id){        
document.getElementById('fotka').src='nahledy/'+slozka+"/"+s[id];                  
document.getElementById('fotka').style.height=h[id]+"px";   
document.getElementById('gal_obr').style.width=w[id]+"px";    
document.getElementById('fotka').style.width=w[id]+"px";     
document.getElementById('fotka').src='fotky/'+slozka+"/"+s[id];
document.getElementById('fotka').alt=s[id];            
//document.getElementById('fotka_a').href="javascript:zobraz('"+(Number(id)+1)+"');";
document.getElementById('galerie_href_l').href="javascript:zobraz('"+(Number(id)-1)+"');";
document.getElementById('galerie_href_r').href="javascript:zobraz('"+(Number(id)+1)+"');";
}

function close_picture(){
document.body.removeChild(document.getElementById('pokryv'));
}

function js_odkazy(nejvyssi_id){
var i=0;
 for(i;i<=nejvyssi_id;i++){
 document.getElementById('odkaz_fotka_'+i).href="javascript:zobraz("+i+");";

 }
}

function zobraz(id){
//s[id] slozka velikost_slozky;
if(id<0){id=velikost_slozky;}
if(id>velikost_slozky){id=0;}
show_picture(id);
}

function scroll(o_kolik){
var nova_sirka=o_kolik+aktualni_sirka_prouzku;
if(nova_sirka>((sirka_prouzku))){
document.getElementById('gal_prouzek_href_r').style.visibility='hidden';
document.getElementById('gal_prouzek').style.width=sirka_prouzku+"px";
prestan_rolovat();
}else if(nova_sirka<1020){
document.getElementById('gal_prouzek_href_l').style.visibility='hidden';
document.getElementById('gal_prouzek').style.width="1020px";
prestan_rolovat();
}else{
document.getElementById('gal_prouzek_href_l').style.visibility='visible';
document.getElementById('gal_prouzek_href_r').style.visibility='visible';
document.getElementById('gal_prouzek').style.width=nova_sirka+"px";
aktualni_sirka_prouzku=nova_sirka;
}
}

function zacni_rolovat(o_kolik){
if(o_kolik>0){
o_kolik=o_kolik+2;
}else{o_kolik=o_kolik-2;}
scroll(o_kolik);
clearTimeout(roluje_se);
roluje_se=setTimeout("zacni_rolovat("+o_kolik+")",100);
}

function prestan_rolovat(){
clearTimeout(roluje_se);
}

function dir_preload(){
    if (document.images)
    {
      preload_image_object = new Array();
    
       var i = 0;
       for(i=0; i<=velikost_slozky; i++){
       
         preload_image_object[i] = new Image();
         preload_image_object[i].src = '/fotky/'+slozka+"/"+s[i];
         }
       }
  
}