function hideFields() {
	var is_parrained = document.getElementById('a_parraine');
	var champs = document.getElementById('champs_parrainage');
	
	
	
	if(is_parrained.value == 1)
		{
			champs.style.display='block';
		}
	else
	{
		champs.style.display='none';	
	}
			
}

function hideFields2() {
	var is_parrained = document.getElementById('billing:a_parraine');
	var champs = document.getElementById('champs_parrainage');
	
	
	
	if(is_parrained.value == 1)
		{
			champs.style.display='block';
		}
	else
	{
		champs.style.display='none';	
	}
			
}