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

function init() 
{
    var loadingDiv = document.getElementById("loadingDiv");
    if (loadingDiv !== null) 
    {
        loadingDiv.style.display = "none";
    }

    var tabElements = document.getElementById('pmatabs');
    if (tabElements !== null)
    {
        // Grab the tab links and content divs from the page
        var tabListItems = tabElements.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
        for (var id in tabLinks) 
        {
            tabLinks[id].onclick = showTab;
            tabLinks[id].onfocus = function () { this.blur() };
        }
    }
}

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);
}