function showSubMenu(id)
{     
    var arr = document.getElementsByTagName('div');       
    for(var i=0; i<arr.length; i++)
    {
        var curDiv = arr[i];
        if(curDiv)
        {
            var index = curDiv.id.indexOf('subMenu',0);
            if(index > -1)
            {
                curDiv.style.display = 'none';
                curDiv.style.visibility = 'hidden';
            }
        }
    }
    
    var div = document.getElementById(id);
    if (div)
    {
        div.style.display = 'block';
        div.style.visibility = 'visible';
    }
}


function changeAppearance(nummer)
{
    var head = document.getElementsByTagName("body");//.getElementById("ctl00_Head");
    if (head){
        for(i=0;i<head.length;i++)
        {
            head[i].className = "Style" + nummer;
        }
    }
    return;
    if (head)
    {
        head.className = "Style" + nummer;
    }
    return;
    /*
    03-11-05 Paul V. Opgelost met CSS
    var img1 = document.getElementById('imgBanner01');
    var img2 = document.getElementById('imgBanner02');
    var img3 = document.getElementById('imgBanner03');
    var img4 = document.getElementById('imgBanner04');
    var img5 = document.getElementById('imgBanner05'); 
    var imgCH = document.getElementById('imgContentHeader');
    var tdCH  = document.getElementById('tdContentHeader'); 
    var tdC  = document.getElementById('tdContent'); 
    var imgCF = document.getElementById('imgContentFooter');
    var tdCF  = document.getElementById('tdContentFooter');          

    switch(nummer)
    {
    case 1:
    {
        img1.src = 'img/head03.jpg';
        img2.src = 'img/head01.jpg';
        img3.src = 'img/head06.jpg';
        img4.src = 'img/head04.jpg';
        img5.src = 'img/head05.jpg';
        imgCH.src = 'img/bodybg01.gif';
        tdCH.style.background = '#E7E7E7';
        tdC.style.background = '#E7E7E7';
        imgCF.src = 'img/footer2.gif';
        tdCF.style.backgroundImage = 'url(img/footerbg.gif)';
        break;
    }
    case 2:
    {
        img1.src = 'img/head03_students.jpg';
        img2.src = 'img/head01_students.jpg';                
        img4.src = 'img/head04_students.jpg';
        img5.src = 'img/head05_students.jpg';
        imgCH.src = 'img/bodybg01students.gif';
        tdCH.style.background = '#FDFBCC';
        tdC.style.background = '#FDFBCC';
        imgCF.src = 'img/footer2students.gif';
        tdCF.style.backgroundImage = 'url(img/footerbgstudents.gif)';
        break;
    }
    case 3:
    {
        img1.src = 'img/head03_teachers.jpg';
        img2.src = 'img/head01_teachers.jpg';                
        img4.src = 'img/head04_teachers.jpg';
        img5.src = 'img/head05_teachers.jpg';
        imgCH.src = 'img/bodybg01teachers.gif';
            tdCH.style.background = '#F0E2F0';
            tdC.style.background = '#F0E2F0';
            imgCF.src = 'img/footer2teachers.gif';
        tdCF.style.backgroundImage = 'url(img/footerbgteachers.gif)';
        break;
    }
    case 4:
    {
        img1.src = 'img/head03_irc.jpg';
        img2.src = 'img/head01_irc.jpg';                
        img4.src = 'img/head04_irc.jpg';
        img5.src = 'img/head05_irc.jpg';
        imgCH.src = 'img/bodybg01irc.gif';
        tdCH.style.background = '#E1E6F5';
        tdC.style.background = '#E1E6F5';
        imgCF.src = 'img/footer2irc.gif';
        tdCF.style.backgroundImage = 'url(img/footerbgirc.gif)';
        break;
    }*/
}

function gotoLink(nav, tar)
{
    if (tar == "_self")            
        document.location.href = nav;
    else
        window.open(nav);
}