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

function initJsTabs() {

// 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 );
}