var tabLinks = new Array();
    var contentDivs = new Array();


    function initTabs() {

      // Grab the tab links and content divs from the page
      var tabListItems = document.getElementById('tabs').childNodes;
      for ( var i = 0; i < tabListItems.length; i++ ) {
        if ( tabListItems[i].nodeName == "LI" ) {
          var tabLink = getFirstChildWithTagName( tabListItems[i], 'A' );
          var id = getHash( tabLink.getAttribute('href') );
          tabLinks[id] = tabLink;
          contentDivs[id] = document.getElementById( id );
        }
      }

      // Assign onclick events to the tab links, and
      // highlight the first tab
      var i = 0;

      for ( var id in tabLinks ) {
        tabLinks[id].onclick = showTab;
        tabLinks[id].onfocus = function() { this.blur() };
        if ( i == 0 ) tabLinks[id].className = 'selected';
        i++;
      }

      // Hide all content divs except the first
      var i = 0;

      for ( var id in contentDivs ) {
        if ( i != 0 ) contentDivs[id].className = 'tabContent hide';
        i++;
      }
    }

    
    function showTab() {
        var selectedId = getHash( this.getAttribute('href') );

        // Highlight the selected tab, and dim all others.
        // Also show the selected content div, and hide all others.
        for ( var id in contentDivs ) {
          if ( id == selectedId ) {
            tabLinks[id].className = 'selected';
            contentDivs[id].className = 'tabContent';
          } else {
            tabLinks[id].className = '';
            contentDivs[id].className = 'tabContent hide';
          }
        }

        // Stop the browser following the link
        return false;
      }

    
    function getFirstChildWithTagName( element, tagName ) {
        for ( var i = 0; i < element.childNodes.length; i++ ) {
          if ( element.childNodes[i].nodeName == tagName ) return element.childNodes[i];
        }
      }

    
    
    function getHash( url ) {
        var hashPos = url.lastIndexOf ( '#' );
        return url.substring( hashPos + 1 );
      }