/*
  Tab navigation with all sections within one page.

20070408 MK	written
*/

var selectedTab, selectedDiv;

function selectDiv (d) {
  d.style.display = 'block';
  selectedDiv = d;
}

function selectNav (t) {
  t.className = 'selected';
  selectedTab = t;

  s = t.href;
  h = s.indexOf('#');
  if (h >= 0) {
    s = s.substr (h+1);
  } else {
    s = 'home';
  }
  d = document.getElementById (s);
  if (d) {
    selectDiv (d);
  } else {
    alert ('sorry, no DIV found for '+s);
  }
}

function switchNav (t) {
  if (selectedTab == t) return false;
  selectedTab.className = '';
  selectedDiv.style.display = 'none';
  selectNav (t);
  return false;
}