<script>
function dzien(x)
{
switch (x)
{
case 1:
document.write('pon');
break;
case 2:
document.write('wtorek');
break;
case 3:
document.write('sroda');
break;
case 4:
document.write('czwartek');
break;
case 5:
document.write('piatek');
break;
case 6:
document.write('sobota');
break;
case 7:
document.write('niedz');
break;
default:
document.write('Błąd');
}
}
dzien(3);
</script>