function hover()
{
    document.getElementById('tussenlaag').style.display="block";
}

function hoverout()
{
    document.getElementById('tussenlaag').style.display="none";
}

function show(layer)
{
    document.getElementById(layer).style.display = "block";
}

function hide(layer)
{
    document.getElementById(layer).style.display = "none";
}

function showDiv(object)
{
    var link = object.getElementsByTagName("a")[0];
    link.style.color = "#005890";
    show("div"+object.id);
}
function hideDiv(object)
{
    var link = object.getElementsByTagName("a")[0];
    link.style.color = "#000000";
    hide("div"+object.id);
}

var layers = new Array();
function showSub(object)
{
    var menu  = document.getElementById("hoofdmenu");
    var subs  = menu.getElementsByTagName("li");
    var color = "#6ea5e8";


    for(a=0;a<subs.length;a++)
    {
        var list  = subs[a].getElementsByTagName("li");
        if(object.id==subs[a].id)
        {
            color = "#005890";
        }
        else
        {
            color = "#6ea5e8";
        }
        for(j=0; j<list.length;j++)
        {
            var links = list[j].getElementsByTagName("a");
            for(k=0; k<links.length; k++)
            {
                if(links[k].className=="active")
                {
                    links[k].style.color = "#000000";
                }
                else
                {
                    links[k].style.color = color;
                }
            }
        }
    }
    for(i=0; i<layers.length; i++)
    {
            if(object.id==layers[i]){
                color = "#005890";
            } else {
                color = "#000000";
            }
            document.getElementById(layers[i]).getElementsByTagName("a")[0].style.color = color;
            show('sub'+layers[i]);
        }
}

function hideSub(object)
{
    for(i=0; i<layers.length; i++)
    {
        if(document.getElementById(layers[i]).getElementsByTagName("a")[0].className)
        {
            document.getElementById(layers[i]).getElementsByTagName("a")[0].style.color = "#005890";
        }
        else
        {
            document.getElementById(layers[i]).getElementsByTagName("a")[0].style.color = "#000000";
        }
        hide('sub'+layers[i]);
    }
}