function slideshow() 
{    
  var $active = $('#slideshow img.active');

  if ( $active.length == 0 ) $active = $('#slideshow img:last');

  var $next =  $active.next().length ? $active.next() : $('#slideshow img:first');

  $active.addClass('last-active');

  $next.css({opacity: 0.0})
    .addClass('active')
    .animate({opacity: 1.0}, 1000, function() {
        $active.removeClass('active last-active');
    });
}
$('#slideshow img:first').addClass('active');
setInterval("slideshow()", 2000);


function obliczyc(form)
{ 
 var cc=parseFloat(form.cena.value);
 var prowizja=parseFloat(form.prowizja.value);
 var taksa=0;
 var vat=0;
 var sad=0;
 var razem=0;
 var podatek=0;

 if (cc!='' && !isNaN(cc) ) {
   document.getElementById('podatek').innerHTML=Math.round(cc*2)/100;
   podatek=document.getElementById('podatek').innerHTML;
 } else {
   document.getElementById('cena').innerHTML=0;
   document.getElementById('podatek').innerHTML=0;
   cc='';
 }

 if (form.forma[0].checked) {
   if ((cc > 0) && (cc <= 3000)) taksa = 100;
   if ((cc > 3000) && (cc <= 10000)) taksa = (100+ ((cc - 3000)*0.03))/2;
   if ((cc > 10000) && (cc <= 30000)) taksa = (310 + ((cc - 10000)*0.02))/2;
   if ((cc > 30000) && (cc <= 60000)) taksa = (710+ ((cc - 30000)*0.01))/2;
   if ((cc > 60000) && (cc <= 1000000)) taksa = (1010 + ((cc - 60000)*0.005))/2;
   if (cc > 1000000) taksa = (5710 + ((cc - 1000000)*0.0025))/2;
 } else if (form.forma[1].checked) {
   if ((cc > 0) && (cc <= 5000)) taksa = 100/2;
   if ((cc > 3000) && (cc <= 10000))  taksa = (100 + ((cc - 3000)*0.03));
   if ((cc > 15000) && (cc <= 30000)) taksa = (310 + ((cc - 10000)*0.02));
   if ((cc > 30000) && (cc <= 60000)) taksa = (710 + ((cc - 30000)*0.01));
   if ((cc > 60000) && (cc <= 1000000)) taksa = (1100 + ((cc - 60000)*0.005));
   if (cc > 1000000) taksa = (5710 + ((cc - 1000000)*0.0025));
 }

 if (!isNaN(taksa)){
   document.getElementById('taksa').innerHTML=Math.round(taksa*100)/100
   document.getElementById('vat').innerHTML=Math.round(taksa*22)/100;
   vat=taksa*22/100;
 } else {
   document.getElementById('taksa').innerHTML=0;
   document.getElementById('vat').innerHTML=0;
   vat=0;
 }

 if(form.forma[1].checked || form.wpis[0].checked){
   if ((cc > 0) && (cc <= 10000))sad = cc * 0.08;
   if ((cc > 10000) && (cc <= 50000))sad = 800 + ((cc - 10000) * 0.07);
   if ((cc > 50000) && (cc <= 100000))sad = 3600 + ((cc - 50000) * 0.06);
   if (cc > 100000) sad = 6600 + ((cc - 100000) * 0.05);  
   sad = 200;
   
   if (sad < 20)sad = 20;
   if (sad > 100000)sad = 100000;
   sad = (Math.round(sad * 100))/100;

   document.getElementById('sad').innerHTML=sad;
 }

 if(form.forma[0].checked && !form.wpis[0].checked){
   sad=0;
   document.getElementById('sad').innerHTML=0;
 }

 if (prowizja>0 && !isNaN(prowizja)){
   document.getElementById('wprowizja').innerHTML=Math.round(cc*prowizja*1.22)/100;
   var wprowizja=parseFloat(document.getElementById('wprowizja').innerHTML);
 } else {
   document.getElementById('wprowizja').innerHTML=0;
   var wprowizja=0;
 }

 var suma_oplat=0;
 suma_oplat=parseFloat(taksa)+parseFloat(wprowizja)+parseFloat(vat)+parseFloat(sad)+parseFloat(podatek);
 if (!isNaN(suma_oplat)){
   document.getElementById('suma_oplat').innerHTML=Math.round(suma_oplat*100)/100;
   razem=parseFloat(suma_oplat)+cc;
   if (!isNaN(razem)) document.getElementById('razem').innerHTML=Math.round(razem*100)/100;
   else document.getElementById('razem').innerHTML=0;
 } else {
   document.getElementById('suma_oplat').innerHTML=0;
   document.getElementById('razem').innerHTML=0;
 }

}