function OpenGallery(ProductID, PageID) {
    OpenCenteredWindow2("/library-furniture/ProductGallery.aspx?id=" + ProductID + "&pid=" + PageID, 500, 500, "ProductGallery");
}

function OpenGraphics(ProductID, PageID) {
    OpenCenteredWindow3("/library-furniture/Graphics.aspx?id=" + ProductID + "&pid=" + PageID, 850, 690, "Graphics");
}

function OpenCenteredWindow2(url, popW, popH, windowname) {

    var w, h;

    if (document.all) {
        w = document.body.clientWidth;
        h = document.body.clientHeight;
    }
    else if (document.layers) {
        w = window.innerWidth;
        h = window.innerHeight;
    }

    //var popW = 874, popH = 560;
    var leftPos = (w - popW) / 2, topPos = (h - popH) / 2;

    window.open(url, windowname,
        'width=' + popW + ',height=' + popH + ',scrollbars=no,status=no,top=' + topPos + ',left=' + leftPos + '');
}

function OpenCenteredWindow3(url, popW, popH, windowname) {

    var w, h;

    if (document.all) {
        w = document.body.clientWidth;
        h = document.body.clientHeight;
    }
    else if (document.layers) {
        w = window.innerWidth;
        h = window.innerHeight;
    }

    //var popW = 874, popH = 560;
    var leftPos = (w - popW) / 2, topPos = (h - popH) / 2;

    window.open(url, windowname,
        'width=' + popW + ',height=' + popH + ',scrollbars=yes,status=no,top=' + topPos + ',left=' + leftPos + '');
}