function initTabs()
{
  var sets = document.getElementsByTagName("div");
  for (var i = 0; i < sets.length; i++)
  {
    if (sets[i].className.indexOf("tabset") != -1)
    {
      var tabs = [];
      var links = sets[i].getElementsByTagName("a");
      for (var j = 0; j < links.length; j++)
      {
        if (links[j].className.indexOf("tab") != -1)
        {
          tabs.push(links[j]);
          links[j].tabs = tabs;
          var c = document.getElementById(links[j].href.substr(links[j].href.indexOf("#") + 1));

          //reset all tabs on start
          if (c) if (links[j].className.indexOf("active") != -1) c.style.display = "block";
          else c.style.display = "none";

          links[j].onclick = function ()
          {
            var c = document.getElementById(this.href.substr(this.href.indexOf("#") + 1));
            if (c)
            {
              //reset all tabs before change
              for (var i = 0; i < this.tabs.length; i++)
              {
                var tab = document.getElementById(this.tabs[i].href.substr(this.tabs[i].href.indexOf("#") + 1));
                if (tab)
                {
                  tab.style.display = "none";
                }
                this.tabs[i].className = this.tabs[i].className.replace("active", "");
              }
              this.className += " active";
              c.style.display = "block";
              return false;
            }
          }
        }
      }
    }
  }
}

if (window.addEventListener)
  window.addEventListener("load", initTabs, false);
else if (window.attachEvent && !window.opera)
  window.attachEvent("onload", initTabs);