function unhide(divID) {
  var item = document.getElementById(divID);
  if (item) {
    item.className=(item.className=='hidden')?'unhidden':'hidden';
  }
}

function hhide(divID) {
  var item = document.getElementById(divID);
  if (item) {
    item.className=(item.className=='unhidden')?'hidden':'hidden';
  }
}


function swap(what)
{
var theDivs = document.getElementsByTagName('div');
for(var i = 0; i < theDivs.length; i++)
{
if(theDivs[i].id.search('swap') == 0)
{
theDivs[i].style.display = 'none';
}
}
document.getElementById('swap'+what).style.display = 'block';
}

window.onload = function()
{
var theDivs2 = document.getElementsByTagName('div');
for(var j = 0; j < theDivs2.length; j++)
{
if(theDivs2[j].id.search('swap') != -1)
{
theDivs2[j].style.display = 'none';
}
}
  var item = document.getElementById('swap0');
  if (item) {
    item.style.display ='block';
  }
}