function facebookshare(user) {
    var uri = document.location.href.split("?")[0] + (user ? "?user=" + user : "");
    var title = document.title;
    var fb_url = "http://www.facebook.com/sharer.php?u=" + encodeURIComponent(uri) + "&t=" + encodeURIComponent(title);
    window.open(fb_url, "facebooksharer", "toolbar=0,status=1,width=626,height=436");
}