function ChangeCSSBgImg() {
    if (!document.getElementById) return false;

    var MyElement = "background" //The ID of the element you want to change
    var ImgPath = "/01/images/backgrounds/" //The file path to your images

    if (!document.getElementById(MyElement)) return false;

    var random_images = new Array();
    random_images[0] = "Vryleve_eigen_huis.jpg";
    random_images[1] = "Vryleve_goede_leven.jpg";
    random_images[2] = "Vryleve_ons_allemaal.jpg";
    random_images[3] = "Vryleve_ons_allemaal2.jpg";
    random_images[4] = "Vryleve_paradijsje.jpg";
    random_images[5] = "Vryleve_reserve.jpg";
    random_images[6] = "Vryleve_service.jpg";
    random_images[7] = "Vryleve_vrije_natuur.jpg";

    var $header = document.getElementById(MyElement);
    var $backgroundurl = $header.style.backgroundImage;
    var ImgURL = "url(" + ImgPath + random_images[rand(random_images.length)] + ")";

    if ($backgroundurl != ImgURL) {
        $header.style.backgroundImage = ImgURL;
    }

    movement = setTimeout("ChangeCSSBgImg()", 10000);
}

function rand(n) {
    return (Math.floor(Math.random() * n));
}

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function () {
            oldonload();
            func();
        }
    }
}

addLoadEvent(ChangeCSSBgImg);

function bepaalpositie(tabel_id, positielinks) {
    var tabel_id
    var positielinks

    breedte = document.getElementById(tabel_id).offsetWidth;

    //positielinks = positielinks

    positielinks_int = positielinks / 1;
    breedte_int = breedte / 1;

    totalebreedte = positielinks_int + breedte_int;

    //alert(breedte)
    if (navigator.appName == "Microsoft Internet Explorer") {
        //Internet Explorer
        if (totalebreedte >= 780) {
            //te breed
            document.getElementById(tabel_id).style.marginLeft = (780 - breedte_int);
        }
        else {
            document.getElementById(tabel_id).style.marginLeft = positielinks
        }
    } else {
        //geen IE
        if (totalebreedte >= 780) {
            //te breed
            document.getElementById(tabel_id).style.marginLeft = (779 - breedte_int);
        }
        else {
            document.getElementById(tabel_id).style.marginLeft = positielinks
        }
    }
}

function HideAllLayers() {
    MM_showHideLayers('menu_woning_zoeken', '', 'hide');
    MM_showHideLayers('menu_nieuws_blog', '', 'hide');
    MM_showHideLayers('menu_diensten_service', '', 'hide');
    MM_showHideLayers('menu_publicaties_downloads', '', 'hide');
    MM_showHideLayers('menu_over_vryleve', '', 'hide');
    MM_showHideLayers('menu_in_contact', '', 'hide');
}

function MM_goToURL() { //v3.0
    var i, args = MM_goToURL.arguments; document.MM_returnValue = false;
    for (i = 0; i < (args.length - 1); i += 2) eval(args[i] + ".location='" + args[i + 1] + "'");
}

function changeStyle(what, how) {
    what.className = how;
}

function changeStyle2(what, how) {
    document.getElementById(what).className = how;
}

function MM_showHideLayers() { //v6.0
    var i, p, v, obj, args = MM_showHideLayers.arguments;
    for (i = 0; i < (args.length - 2); i += 3) if ((obj = MM_findObj(args[i])) != null) {
        v = args[i + 2];
        if (obj.style) { obj = obj.style; v = (v == 'show') ? 'visible' : (v == 'hide') ? 'hidden' : v; }
        obj.visibility = v;
    }
}

function MM_preloadImages() { //v3.0
    var d = document; if (d.images) {
        if (!d.MM_p) d.MM_p = new Array();
        var i, j = d.MM_p.length, a = MM_preloadImages.arguments; for (i = 0; i < a.length; i++)
            if (a[i].indexOf("#") != 0) { d.MM_p[j] = new Image; d.MM_p[j++].src = a[i]; } 
    }
}

function MM_swapImgRestore() { //v3.0
    var i, x, a = document.MM_sr; for (i = 0; a && i < a.length && (x = a[i]) && x.oSrc; i++) x.src = x.oSrc;
}

function MM_findObj(n, d) { //v4.01
    var p, i, x; if (!d) d = document; if ((p = n.indexOf("?")) > 0 && parent.frames.length) {
        d = parent.frames[n.substring(p + 1)].document; n = n.substring(0, p);
    }
    if (!(x = d[n]) && d.all) x = d.all[n]; for (i = 0; !x && i < d.forms.length; i++) x = d.forms[i][n];
    for (i = 0; !x && d.layers && i < d.layers.length; i++) x = MM_findObj(n, d.layers[i].document);
    if (!x && d.getElementById) x = d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
    var i, j = 0, x, a = MM_swapImage.arguments; document.MM_sr = new Array; for (i = 0; i < (a.length - 2); i += 3)
        if ((x = MM_findObj(a[i])) != null) { document.MM_sr[j++] = x; if (!x.oSrc) x.oSrc = x.src; x.src = a[i + 2]; }
}

function containsDOM(container, containee) {
    var isParent = false;
    do {
        if ((isParent = container == containee))
            break;
        containee = containee.parentNode;
    }
    while (containee != null);
    return isParent;
}

function checkMouseEnter(element, evt) {
    if (element.contains && evt.fromElement) {
        return !element.contains(evt.fromElement);
    }
    else if (evt.relatedTarget) {
        return !containsDOM(element, evt.relatedTarget);
    }
}

function checkMouseLeave(element, evt) {
    if (element.contains && evt.toElement) {
        return !element.contains(evt.toElement);
    }
    else if (evt.relatedTarget) {
        return !containsDOM(element, evt.relatedTarget);
    }
}