function byID(id)
{
	var obj;
	if (document.getElementById) obj = document.getElementById(id);
	else if (document.all) obj = document.all[id];
	else if (document.layers) {
		obj 	  = document.layers[id];
		obj.style = document.layers[id];	
	}
	return obj;	
}

var ns4 = (document.layers)? true:false;
var ns6 = (document.getElementById) && !(document.all)? true:false;

function checkRegister()
{
	if (document.forms.register.podmiot[1].checked) {
		byID('osoba-prywatna').style.display = 'none';
		byID('firma').style.display = 'block';
	} else {
		byID('osoba-prywatna').style.display = 'block';
		byID('firma').style.display = 'none';
	}	
}

function checkWysylka(t, id)
{
	if (byID(t).checked) {
		byID(id).style.display = 'block';
	} else {
		byID(id).style.display = 'none';
	}	
}

function zmienProjekt()
{
	id = byID('aaa').options[byID('aaa').selectedIndex].value;
	
	if (id == '') {
		byID('koszt-projektu').innerHTML = "";
		byID('koszt-projektu2').innerHTML = "";
		byID('koszt-wysylki').innerHTML = "";
		byID('koszt-suma').innerHTML = "";			
	} else {
		cena = projects[id];
		byID('koszt-projektu').innerHTML = cena+" zł";
		byID('koszt-projektu2').innerHTML = cena+" zł";	
		
		if (cena >= 1500) {
			byID('koszt-wysylki').innerHTML = "gratis!";
			byID('koszt-suma').innerHTML = cena+" zł";
		} else {
			byID('koszt-wysylki').innerHTML = "100 zł";
			byID('koszt-suma').innerHTML = (cena + 100)+" zł";
		}
	}
}