function loadRadboxWidget(widget_container, video_url) {
    var f = document.createElement("iframe");
    f.setAttribute("src","http://radbox.me/widget/embed?u="+video_url);
    f.setAttribute("scrolling", "no");
    f.setAttribute("frameborder", "0");
    f.setAttribute("style","border:none; width:100px; height:40px");
    myWidget = document.getElementById(widget_container);
    myWidget.appendChild(f);
}