function show_shipment(id,box) 
{
	var display = (box.checked) ? "block" : "none";
	document.getElementById(id).style.display = display;
}

function enable_register_button()
{
	var button = document.getElementById('register_button');
	
	if (document.getElementById('tos_checkbox').checked) 
	{
		button.disabled=false;
		button.style.opacity=1;button.filters.alpha.opacity=100;
	} 
	else 
	{
		button.disabled=true;
		button.style.opacity=0.4;button.filters.alpha.opacity=40;
	}
}