function TabClick(id) 
{
    DisableAllTabs();
    EnableTab(id);
}

function DisableTab(id) 
{
    var contentid = 'Content_' + id;
    var tabid = 'Tab_' + id;

    if (document.getElementById)
    { 
        document.getElementById(contentid).style.display = 'none';
        document.getElementById(tabid).className = 'TabUnSelected';
    } 
    else 
    { 
        if (document.layers) 
        { 
            document.contentid.display = 'none'; 
            document.tabid.className = 'TabUnSelected'; 
        } 
        else 
        { 
            document.all.contentid.style.display = 'none'; 
            document.all.tabid.className = 'TabUnSelected';
        }
    }
}

function EnableTab(id) 
{
    var contentid = 'Content_' + id;
    var tabid = 'Tab_' + id;

    if (document.getElementById)
    { 
        document.getElementById(contentid).style.display = 'block'; 
        document.getElementById(tabid).className = 'TabSelected';
        document.getElementById('sitemapState').value = id;
    } 
    else 
    { 
        if (document.layers) 
        { 
            document.contentid.display = 'block';
            document.tabid.className = 'TabSelected';
            document.sitemapState.value = id;
        } 
        else 
        { 
            document.all.contentid.style.display = 'block'; 
            document.all.tabid.className = 'TabSelected';            
            document.all.sitemapState.value = id;
        }
    }
    
}