function ShowRadial() {
  document.getElementById("diagonal").style.display = 'none';  
  document.getElementById("radial").style.display = 'inline';
}

function ShowDiagonal() {
  document.getElementById("radial").style.display = 'none';  
  document.getElementById("diagonal").style.display = 'inline';  
}

// This function initialzes all the form elements to default values.
function InitForm() {
  // Set all checkboxes and radio buttons on form to unchecked.
  for (i=0; i < document.dekkbanknyedekkForm.elements.length; i++) {
    if (document.dekkbanknyedekkForm.elements[i].type == 'checkbox' | document.dekkbanknyedekkForm.elements[i].type == 'radio') {
      document.dekkbanknyedekkForm.elements[i].checked = false;
    }
  }
  ShowRadial();  
  document.dekkbanknyedekkForm.rad_diag[0].checked = true;
}