function fixImg(){ 
    var imglist = document.images; 
    for(var i = 0; i < imglist.length; i++){ 
      imglist[i].onerror = function() { 
        this.src = "http://www.co-robie.pl/noavatar.gif"; 
      } 
      imglist[i].src = imglist[i].src; 
    } 
  } 
fixImg();