function enableFields(form,field)
{
	if((field.value) == "CC")
	{		
		form.cvv.disabled = false;
				
		document.getElementById("cvvCode").style.visibility = "visible";
		document.getElementById("cvvCode").style.display = "inline";
	}
	
	else
	{
		form.cvv.value = "";
		form.cvv.disabled = true;
		
		document.getElementById("cvvCode").style.visibility = "hidden";
		document.getElementById("cvvCode").style.display = "none";
	}
}