function ZmienOpcje (dzial, opcja, cena) {
   Ccena = document.getElementById("Cena");
   Ccena.innerHTML = parseFloat(Cena.innerHTML) - parseFloat(TabCeny[dzial]);
   TabCeny[dzial] = parseFloat(document.getElementById('opcja_' + dzial + '_' + opcja).title);

         var b = document.getElementById('dzial_'+dzial).getElementsByTagName('B');
   var temp;
   for(var i = 0 ; i < b.length ; i++) {
      temp = '' + (parseFloat(b[i].title) - parseFloat(TabCeny[dzial]));
      temp = FloatToCena(temp);
      b[i].innerHTML = '' + ((temp > 0) ? '+':'') + temp;
   }
   document.getElementById('opcja_' + dzial + '_' + opcja).innerHTML = 'w cenie';
   Ccena.innerHTML = parseFloat(Ccena.innerHTML) + parseFloat(document.getElementById('opcja_' + dzial + '_' + opcja).title);
   Ccena.innerHTML = FloatToCena(Ccena.innerHTML);
   document.getElementById("CenaPOST").value = Ccena.innerHTML;
}
  
function FloatToCena (str) {
   var dec;
   if (str.indexOf('.') == -1)
      str = str + '.00';
   else {
           dec = str.slice(str.indexOf('.'));
      if (dec.length == 2)
         str = str + '0';
   }
   return str;
}

function cyfrykod(event,f)
{
  if (event.srcElement) {kc = event.keyCode;} else {kc = event.which;}
  if ((kc < 45 || kc > 57) && kc != 8 && kc != 0) return false;
  return true;
}



        

    function Cennik(){
        var h = 600;
        var w = 800;
        window.open("/cennik.php","Cennik","scrollbars=1,width="+w+",height="+h+",");
        }    
        
        

        
        
        function createCookie(name,value,days) {
                value = escape(value);
            if (days) {
                var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
                var expires = "; expires="+date.toGMTString();    }
            else var expires = "";
            document.cookie = name+"="+value+expires+"; path=/";
        }

        function readCookie(name) {
            var nameEQ = name + "=";
            var ca = document.cookie.split(';');
            for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) {
                zonk = c.substring(nameEQ.length,c.length);
                zonk = unescape(zonk);
                return zonk;
                }
            }
            return null;
        }

        function eraseCookie(name) {
            createCookie(name,"",-1);
        }


       
        

        
        function schowek(id){
                createCookie("Przechowalnia["+id+"]",id,"365");
                alert("Produkt dodano do schowka.");
        }
  
  

         
         function schowajAlert(){
            var selects = document.getElementsByTagName("select");
               for (i = 0; i != selects.length; i++) {
                      selects[i].style.visibility = "visible";
               }
               
       
         document.getElementById("myalert").style.display = 'none';
         document.getElementById("myalerttlo").style.display = 'none';
         
         }