if (document.getElementById && document.getElementsByTagName && document.createTextNode) {
document.write('<link rel="stylesheet" type="text/css" href="js_hide.css" />');
window.onload = initShowHide;
}

function initShowHide() {
hide();
var toggle = document.getElementById('toggle');
var as = toggle.getElementsByTagName('a');
var selected = as[0];
var urlTarget = document.location.hash;
for (var i=0; i < as.length; i++)
{
  var id = as[i].href.match(/(#\w.+)/)[1];
  if (id == urlTarget)
  {
      selected = as[i]
  }
}
show(selected);
for (var i = 0; i < as.length; i++) {
as[i].onclick = function() {
show(this);
return false;
}
}
}

function show(s) {
hide();
var id = s.href.match(/#(\w.+)/)[1];
var oldCurrent = document.getElementById('current');
// If this element exists, remove its ID attribute
if (oldCurrent) oldCurrent.removeAttribute('id');
// Add the ID attribute with value 'current' to the newly active tab header (LI element)
s.parentNode.setAttribute('id', 'current');
document.getElementById(id).style.display = 'block';
var scrollArea = document.getElementById("toggleable");
scrollArea.scrollTop = 0;
scrollArea.scrollLeft = 0;
}

function hide() {
var toggleable = document.getElementById('toggleable').getElementsByTagName('div');
for (var i = 0; i < toggleable.length; i++) {
toggleable[i].style.display = 'none';
}
}

//Returns a random number between 0 (inclusive) and 1 (exclusive)
function getRandom() {
return Math.round(Math.random());
}