$(document).ready(function() {
	
	if ($('#paymentform').length == 1) {
		
		$('#paymenttypeid').change(function() {
			
			var surcharge = parseInt($(this).find('option:selected').attr('data-surcharge'));

			if (surcharge > 0) {

				$('#surchargerow').show();

				var amount = parseFloat($('#amount').val());

				$('#surchargerow').find('td input').val('£' + (amount * (1 + surcharge / 100)).toFixed(2));

			} else {
				
				$('#surchargerow').hide();

			}

		});

	}

});