function toggle(id)
{
    ul = "ul-" + id;
    showlink = "showlink-" + id;
    hidelink = "hidelink-" + id;
    
    ulElement = document.getElementById(ul);
    
    showLinkElement = document.getElementById(showlink);
    hideLinkElement = document.getElementById(hidelink);
    
    if (ulElement)
    {
        if (ulElement.style.display == 'block')
        {
            ulElement.style.display = 'none'; 
            showLinkElement.style.display = 'block'; 
            hideLinkElement.style.display = 'none'; 
        }
        else
        {
            ulElement.style.display = 'block';
            showLinkElement.style.display = 'none'; 
            hideLinkElement.style.display = 'block';  
        }
    }
}

function toggleTree(id)
{
    ul = "ul_" + id;
    img = "img_" + id;
    ulElement = document.getElementById(ul);
    imgElement = document.getElementById(img);
    
    if (ulElement)
    {
        if (ulElement.style.display == 'block')
        {
            ulElement.style.display = 'none';
            imgElement.src = "http://img.derdubor.no/gfx/pink-expand.png";
            imgElement.style.display='inline';
        }
        else
        {
            ulElement.style.display = 'block';
            imgElement.src = "http://img.derdubor.no/gfx/pink-reduce.png";
            imgElement.style.display='inline';
        }
    }
}