var maleFirstNames = new Array(
  "Stony",
  "Craggy",
  "Woody",
  "Cliff",
  "Monty",
  "Wadi",
  "Rusty",
  "Dusty",
  "Sandy"
);
var femaleFirstNames = new Array(
  "Ikea",
  "Parmalat",
  "Tetra",
  "Citroën",
  "Wasa",
  "Marmite",
  "Guinness",
  "Garnier",
  "Nokia",
  "Prada"
);

var maleLastNames = new Array(
  "Canyon",
  "Mesa",
  "Arroyo",
  "Beach",
  "Fjord",
  "Isthmus",
  "Dune",
  "Gulch"
);

var femaleLastNames = new Array(
  "Thames",
  "Loire",
  "Shannon",
  "Oder",
  "Dnieper",
  "Vistula",
  "Po",
  "Don",
  "Volga",
  "Elbe"
);
function NamegenMale()
{
  var firstNameIndex = Math.floor(Math.random() * maleFirstNames.length);
  var lastNameIndex = Math.floor(Math.random() * maleLastNames.length);
  var combinedName = maleFirstNames[firstNameIndex] + " " +
    maleLastNames[lastNameIndex];
  document.getElementById("namegen_output").innerHTML = combinedName;
}
function NamegenFemale()
{
  var firstNameIndex = Math.floor(Math.random() * femaleFirstNames.length);
  var lastNameIndex = Math.floor(Math.random() * femaleLastNames.length);
  var combinedName = femaleFirstNames[firstNameIndex] + " " +
    femaleLastNames[lastNameIndex];
  document.getElementById("namegen_output").innerHTML = combinedName;
}