function overButton(img)
    {
        img.src = "img/subscribe_.gif";
    }
    
    function outButton(img)
    {
        img.src = "img/subscribe.gif";
    }
    
    function defImage(img)
    {   
       img.src = "img/none.gif";
    }
    
    function defFlag(img)
    {
        img.src = "img/l.gif";
    }

    function onSubscribe(url)
    {
        imageService.src = "subscribe.aspx?u=" + url;
        window.external.action("ADD","RSS", url );
    }