$(document).ready(function() { 

	setVisibilityOnShipToAddressForm();

	$('#use_different_ship_to_address').click(function(){ 
		setVisibilityOnShipToAddressForm();
	});	

	function setVisibilityOnShipToAddressForm() {
		if($('#use_different_ship_to_address:checked').is(':checked')){
			$("#ship_to_address_fields").fadeIn('slow');
		} else {
			$("#ship_to_address_fields").fadeOut('slow');
		}
	}

});