function makeRbFrame() { 
  var rb_ifrm = document.createElement("IFRAME");
  var rb_src_domain = "&srcd=" + document.location.href.replace(/^[a-z:]+\/\//,"").replace(/\/.*/,"");
  rb_ifrm.setAttribute("src", rbw_url+rb_src_domain);
  rb_ifrm.style.width = rbw_width;
  rb_ifrm.style.height = rbw_height;
  rb_ifrm.style.border = "none";
  rb_ifrm.frameBorder = "0px";
  document.getElementById("rb_swt").appendChild(rb_ifrm);
}
makeRbFrame();