var sp_w = true
var wpis = false

Number.prototype.format = function(){
var a = new String(this)
a = a.split(/\,|\./)
a[0] = a[0].split('')
var st = a[0].length%3
var ret = ""
var i=0
for(var j=0; j < a[0].length; i++)
ret+=(i == st || (i-st)%4 == 0 ? " " : a[0][j++])
return ret.replace(/(^\s*)|(\s*$)/g, "") + (a[1] ? "." + a[1] : "")
}

function setval(src){
sp_w = src.value != 20
calculate()
}

function calculate(){
var m = parseFloat(document.forms[0].cn.value)
var tpod = parseFloat(0.02*m).toFixed(2)
var tvat 
var ttn = 0 
var tops 
var tprow 
var topd 
var tsuma



document.forms[0].pod.value = tpod
if(m <= 0) ttn = 0
if(m <= 3000) ttn = 100
if(m <= 10000) ttn = 100 + 0.03*(m - 3000)
if(m <= 30000) ttn = 310 + 0.02*(m - 10000)
if(m <= 60000) ttn = 710 + 0.01*(m - 30000)
if(m <= 1000000) ttn = 1010 + 0.005*(m - 60000)
if(m > 1000000) ttn = 5710 + 0.0025*(m - 1000000)

tops = 200
if(sp_w)
{
ttn = ttn/2
if(tops < 20)
tops = 20
if(!wpis)
tops = 0
}
if(!sp_w && tops < 20)
tops = 20

tvat = parseFloat(0.22 * ttn).toFixed(2)
tprow = (parseFloat(document.forms[0].prow.value)/100) * m
topd = parseFloat(parseFloat(tpod) + parseFloat(ttn) + parseFloat(tops) + parseFloat(tprow) + parseFloat(tvat))
tsuma = parseFloat(m + topd)
tops = parseFloat(tops).toFixed(2)
ttn = parseFloat(ttn).toFixed(2)
tprow = parseFloat(tprow).toFixed(2)
topd = parseFloat(topd).toFixed(2)
tsuma = parseFloat(tsuma).toFixed(2)

document.forms[0].ops.value = tops
document.forms[0].tn.value = ttn
document.forms[0].vat.value = tvat
document.forms[0].cprow.value = tprow
document.forms[0].opd.value = topd
document.forms[0].suma.value = parseFloat(tsuma)
}

function chops(){
if(wpis)
wpis = false
else
wpis = true
calculate()
}

function check(){
var m = parseInt(document.forms[0].cn.value)
if(isNaN(m))
document.forms[0].cn.value = 0
else
document.forms[0].cn.value = m
calculate()
}

function check2(){
var p = String(document.forms[0].prow.value).replace(",",".")
document.forms[0].prow.value = p
if(p == "")
{
document.forms[0].prow.value = 0
calculate()
}

p = parseFloat(p)
if(!isNaN(parseInt(p)))
calculate()
}1