function ESSOX_aktualizuj(typ) {
    return eval("ESSOX_splatkyJS_" + typ + "(ESSOX_get('ESSOX_" + typ + "_cena'),ESSOX_get('ESSOX_" + typ + "_akontace'),ESSOX_get('ESSOX_" + typ + "_pocetSplatek'))");
  }

  function ESSOX_get(el) {
  return (document.getElementById(el).type=="select") ? document.getElementById(el).options[document.getElementById(el).selectedIndex].value : document.getElementById(el).value;
  }
  
  function ESSOX_maxCastka(typZbozi,akontace) {
  akontace *= 1; typZbozi *= 1; 
  switch (typZbozi) {
    case 1: switch (akontace) {case 0: max = 40000; break; case 10: max = 60000; break; case 20: max = 80000; break; case 30: case 40: case 50: case 60: case 70: max = 500000; break; default: max = false;} break;

    default: max = false;
  }
  return max;
  }
  
function setContent(el,res) {
if (document.getElementById(el).textContent) document.getElementById(el).textContent = res;
else document.getElementById(el).innerText = res;
}

function rozdilDnu(pujcDen,pujcMes,pujcRok,splDen,splMes,splRok)
{
    pujcDen = parseInt(pujcDen);
	pujcMes = parseInt(pujcMes);
	pujcRok = parseInt(pujcRok);
    splDen = parseInt(splDen);
	splMes = parseInt(splMes);
	splRok = parseInt(splRok);
    if (pujcMes <= 2) { pujcRok -=1; pujcMes +=12; }
	a = Math.floor( pujcRok/100 );
	b = 2 - a + Math.floor( a/4 );
	JulianDayPujcka = Math.floor( 365.25 * ( pujcRok + 4716 )) + Math.floor( 30.6001 * ( pujcMes + 1 )) + pujcDen + b;
	if (splMes <= 2) { splRok -=1; splMes +=12; }
	a = Math.floor( splRok/100 );
	b = 2 - a + Math.floor( a/4 );
	JulianDaySplatka = Math.floor( 365.25 * ( splRok + 4716 )) + Math.floor( 30.6001 * ( splMes + 1 )) + splDen + b;  		 
    return ( JulianDaySplatka - JulianDayPujcka );  
} 

function fhodnota(pujcka,rok,tsplatka,tcas,sazba)
{
	soucet = 0;
    for (i=0; i<tsplatka.length; i++)
    {
       soucet += (tsplatka[i])/Math.pow((1+sazba),tcas[i]/rok);        
    }
    return(soucet - pujcka);
}

function ESSOXpocitejRPSN(pocetSplatek,pujcka,splatka) 
{  
	rok = 365;
  pujcDen = 1;
  pujcMes = new Date(); pujcMes = parseInt(pujcMes.getMonth()+1);
  pujcRok = new Date(); pujcRok = parseInt(pujcRok.getFullYear());
	
	aSplatka = new Array();
	cas = new Array();
	for (i=(pujcMes+1); i<pocetSplatek+(pujcMes+1); i++)
	{
	  aSplatka[(i-(pujcMes+1))] = splatka;
    splDen = 15;
    splMes = (i%12) ? i%12 : 12;
    splRok = pujcRok;
    splRok += (i>12) ? Math.floor((i-1)/12) : 0;
    cas[(i-(pujcMes+1))] = rozdilDnu(pujcDen,pujcMes,pujcRok,splDen,splMes,splRok); 
    } 
		
    rozdilstr = 0;
    odhad1 = 0; 
    odhad2 = 10.001;  // i.e. predpoklada se, ze koren lezi mezi 0% a 1000%
    fhodnota1 = fhodnota(pujcka,rok,aSplatka,cas,odhad1);
    fhodnota2 = fhodnota(pujcka,rok,aSplatka,cas,odhad2);
    if (fhodnota1*fhodnota2<0) 
    {
	        odhadstr = (odhad1 + odhad2)/2;
        	fhodnotastr = fhodnota(pujcka,rok,aSplatka,cas,odhadstr);
        
        	do {
			   if ((fhodnota1*fhodnotastr)>0) odhad1 = odhadstr;
   		       if ((fhodnota2*fhodnotastr)>0) odhad2 = odhadstr;
        	   fhodnota1 = fhodnota(pujcka,rok,aSplatka,cas,odhad1);
        	   fhodnota2 = fhodnota(pujcka,rok,aSplatka,cas,odhad2);
        	   rozdilstr = Math.abs(odhadstr - (odhad1 + odhad2)/2);
               odhadstr = (odhad1 + odhad2)/2;
               fhodnotastr = fhodnota(pujcka,rok,aSplatka,cas,odhadstr);
        	} 
        	while (rozdilstr>0.000001);    
            rpsn2 =Math.round(odhadstr*10000)/100; 
    }
    else if (fhodnota1 == 0) rpsn2 = "0";
		 else rpsn2 = "0"; 
		 
	return rpsn2;
	
}

  ESSOX_typZbozi = 1; // 1 - kola, VT, nábytek, bílá el., zahr.mechanizace; 3 - mobilní telefony; 2 - ostatní
  
  function ESSOX_splatky_0navroz(castka,akontace,pocetSplatek) {
  castka = (parseInt(castka)) ? parseInt(castka) : 0; akontace = parseInt(akontace); pocetSplatek = parseInt(pocetSplatek); 
    switch (akontace) {

    case 30:
      switch (pocetSplatek) {
      case 3: koef = 23.33; break; case 4: koef = 17.50; break; case 5: koef = 14.00; break; case 6: koef = 11.67; break;
      case 7: koef = 10.00; break; case 8: koef =  8.75; break; case 9: koef =  7.78; break; case 10: koef = 7.00; break; 
      case 11: koef = 6.36; break; case 12: koef = 5.83; break; case 13: koef = 5.38; break; case 14: koef = 5.00; break;
      case 15: koef = 4.67; break; case 16: koef = 4.38; break; case 17: koef = 4.12; break; case 18: koef = 3.89; break;
      case 19: koef = 3.68; break; case 20: koef = 3.50; break; case 21: koef = 3.33; break; case 22: koef = 3.18; break;
      case 23: koef = 3.04; break; case 24: koef = 2.92; break; default: koef = 0; 
      } break; 
    case 40:
      switch (pocetSplatek) {
      case 3: koef = 20.00; break; case 4: koef = 15.00; break; case 5: koef = 12.00; break; case 6: koef = 10.00; break;
      case 7: koef =  8.57; break; case 8: koef =  7.50; break; case 9: koef =  6.67; break; case 10: koef = 6.00; break; 
      case 11: koef = 5.45; break; case 12: koef = 5.00; break; case 13: koef = 5.62; break; case 14: koef = 4.29; break;
      case 15: koef = 4.00; break; case 16: koef = 3.75; break; case 17: koef = 3.53; break; case 18: koef = 3.33; break;
      case 19: koef = 3.16; break; case 20: koef = 3.00; break; case 21: koef = 2.86; break; case 22: koef = 2.73; break;
      case 23: koef = 2.61; break; case 24: koef = 2.50; break; default: koef = 0; 
      } break; 
    case 50:
      switch (pocetSplatek) {
      case 3: koef = 16.67; break; case 4: koef = 12.50; break; case 5: koef = 10.00; break; case 6: koef = 8.33; break;
      case 7: koef =  7.14; break; case 8: koef =  6.25; break; case 9: koef =  5.56; break; case 10: koef = 5.00; break; 
      case 11: koef = 4.55; break; case 12: koef = 4.17; break; case 13: koef = 3.85; break; case 14: koef = 3.57; break;
      case 15: koef = 3.33; break; case 16: koef = 3.13; break; case 17: koef = 2.94; break; case 18: koef = 2.78; break;
      case 19: koef = 2.63; break; case 20: koef = 2.50; break; case 21: koef = 2.38; break; case 22: koef = 2.27; break;
      case 23: koef = 2.17; break; case 24: koef = 2.08; break; default: koef = 0; 
      } break; 
    case 60:
      switch (pocetSplatek) {
      case 3: koef = 13.33; break; case 4: koef = 10.00; break; case 5: koef = 8.00; break; case 6: koef = 6.67; break;
      case 7: koef =  5.71; break; case 8: koef =  5.00; break; case 9: koef = 4.44; break; case 10: koef = 4.00; break; 
      case 11: koef = 3.64; break; case 12: koef = 3.33; break; case 13: koef = 3.08; break; case 14: koef = 2.86; break;
      case 15: koef = 2.67; break; case 16: koef = 2.50; break; case 17: koef = 2.35; break; case 18: koef = 2.22; break;
      case 19: koef = 2.11; break; case 20: koef = 2.00; break; case 21: koef = 1.90; break; case 22: koef = 1.82; break;
      case 23: koef = 1.74; break; case 24: koef = 1.67; break; default: koef = 0; 
      } break; 
    case 70:
      switch (pocetSplatek) {
      case 3: koef = 10.00; break; case 4: koef =  7.50; break; case 5: koef =  6.00; break; case 6: koef = 5.00; break;
      case 7: koef =  4.29; break; case 8: koef =  3.75; break; case 9: koef =  3.33; break; case 10: koef = 3.00; break; 
      case 11: koef = 2.73; break; case 12: koef = 2.50; break; case 13: koef = 2.31; break; case 14: koef = 2.14; break;
      case 15: koef = 2.00; break; case 16: koef = 1.88; break; case 17: koef = 1.76; break; case 18: koef = 1.67; break;
      case 19: koef = 1.58; break; case 20: koef = 1.50; break; case 21: koef = 1.43; break; case 22: koef = 1.36; break;
      case 23: koef = 1.30; break; case 24: koef = 1.25; break; default: koef = 0; 
      } break; 
    default: koef = 0;
    }

    splatka = Math.ceil(castka*koef/100);
    navyseni = Math.round((((splatka - ((castka*((100-akontace)/100))/pocetSplatek))*pocetSplatek) / castka) * 10000)/100;
    rpsn = ESSOXpocitejRPSN(pocetSplatek,(castka - (castka*akontace*0.01)),(castka*koef/100));
    return new Array(splatka,rpsn,castka);
  }
  
  function ESSOX_splatkyJS_0navroz(castka,akontace,pocetSplatek) {
    max = ESSOX_maxCastka(ESSOX_typZbozi,akontace);
    chyba = "";
    if (akontace < 30 && ESSOX_typZbozi == 3) chyba = "U mobilních telefonů je minimální záloha 30 %.";
    if (max < castka) chyba = "Maximální prodejní cena pro zadanou zálohu je " + max + " Kč.";
    if (castka < 3000) chyba = "Minimální prodejní cena je 3000 Kč.";
    if (chyba!="") { retVal = new Array(0,0,0); window.alert(chyba); } 
    else 
      retVal = ESSOX_splatky_0navroz(castka,akontace,pocetSplatek);
    setContent('ESSOX_kalkulacka_0navroz',(retVal[0]) ? retVal[0] +  ",- Kč/měs." : "CHYBA !!!");
    setContent('ESSOX_0navroz_RPSN',(retVal[0]) ? "od " + retVal[1] +  " %" : "-");
    document.getElementById('ESSOX_0navroz_tRPSN').value = retVal[1];
    document.getElementById('ESSOX_0navroz_cena').value = retVal[2];
    document.getElementById('ESSOX_0navroz_splatka').value = retVal[0];
    document.getElementById('ESSOX_0navroz_predem').value = Math.round(parseInt(akontace)*parseInt(castka)/100);
  }