onIconLoadError = function(img) {
    img.src = '/images/bookmark-default.gif'
}


clk = function(tag) {
    share_id = this.location.href.split('/').pop();
    (new Image).src="http://tr.foxmarks.com/tracking/impressions.gif" +
    "?app=share" + 
    "&tracking=click" + 
    "&share_id=" + share_id + 
    "&dest=" + encodeURIComponent(tag.href) +
    "&env=" + window.foxmarks_env +
    "&no_cache=" + (new Date).getTime();
    return true;
}