function ImagesResize() {
  var obj = document.getElementsByTagName("div");
  for(var i = 0;i<obj.length;i++) {
    if (obj[i].className == "bbimg") {
      var img = obj[i].getElementsByTagName("img");
      if (img[0].width > 640) { obj[i].innerHTML = '<div align=left><a href="' + img[0].src + '" target="_blank"><img src="' + img[0].src + '" width="640" alt="Click For Full Size Image"></a></div>'; }
    }
  }
}