function el(id) {if (document.getElementById) {return document.getElementById(id);} else if (window[id]) {return window[id];}return null;}
function show(id)
{
 el(id).style.visibility='visible';
}
function hidden(id)
{
	el(id).style.visibility='hidden';
}

function openPopUp(plik) 
{
	wysokosc = 450;
	szerokosc = 600;
	wysokosc +=15;
	
	window.open('http://www.anlero-polska.pl/showphoto.php?wysokosc='+wysokosc+'&szerokosc='+szerokosc+'&plik='+plik,'prewiev','directories=no,location=no,menubar=no,resizable=no,scrollbars=no,status=yes,toolbar=no');
	return false;
}

function put_email(a, b){ document.write('<a href="mailto:'+a+'@'+b+'">'+a+'@'+b+'</a>'); }

function calculate()
{
var enpb_price=parseFloat (document.calc.enpb_price.value.replace (",", "."));
var lpg_price=parseFloat (document.calc.lpg_price.value.replace (",", "."));
var cng_price=parseFloat (document.calc.cng_price.value.replace (",", "."));
var usage=parseFloat (document.calc.usage.value.replace (",", "."));
var lpg_usage = document.getElementById ("lpg_usage");
var cng_usage = document.getElementById ("cng_usage");
var lpg_usage_value = parseFloat (document.calc.lpg_factor.value.replace (",", ".")) * usage;
var cng_usage_value = parseFloat (document.calc.cng_factor.value.replace (",", ".")) * usage;
lpg_usage.innerHTML = format_float (lpg_usage_value);
cng_usage.innerHTML = format_float (cng_usage_value);
var enpb_total = document.getElementById ("enpb_total");
var lpg_total = document.getElementById ("lpg_total");
var cng_total = document.getElementById ("cng_total");
enpb_total.innerHTML = format_float (enpb_price*usage);
lpg_total.innerHTML = format_float (lpg_usage_value * lpg_price);
cng_total.innerHTML = format_float (cng_usage_value * cng_price);
}