function show_test_gateway_links() {
  document.getElementById("test_gateway_links").style.display = "block"; 
  document.getElementById("test_gateway_help").style.display = "none"; 
}

function set_credit_card_value(value) {
  document.getElementById("credit_card_number").value = value;
  document.getElementById("credit_card_verification_value").value = 234;
  
  var d = new Date();
  document.getElementById("credit_card_month").value = d.getMonth() + 2;
  document.getElementById("credit_card_year").value = d.getFullYear() + 1;
}