function openShowroom(lang) {
    
    if(lang == 'en') {
        var url = 'http://www.v-showroom.com/8200488/productgroup/';
    } else {
        var url = 'http://www.v-showroom.com/de/8200488/productgroup/';
    }
    
    var height = 580;
    var width = 780;
    var top = ((screen.availHeight)/2 -height/2);
    var left = ((screen.width)-width)-20;

    showroomWindow = window.open(url, "showroomWindow", "resizable=no,location=no,scrollbars=no,width="+width+",height="+height+",left="+left+",top="+top);
    showroomWindow.focus();
}