BBS ReCaptcha Fix

// ==UserScript==
// @name         BBS ReCaptcha Fix
// @version      1.0
// @description  Fix the BBS's ReCaptcha
// @author       Degritone
// @match        *://dollars-bbs.org/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

window.nameWithoutCollision = window.location.href.match(/\.org\/.+?\//)[0].replace(".org","").replace("/","")+"/kareha.pl";
window.self = window;

window.preview_post = function(formid,thread){
  let form=document.getElementById(formid);
  let preview=document.getElementById("preview"+thread);

  if(!form||!preview) return;

  preview.style.display="";
  preview.innerHTML="<em>Loading...</em>";
  let text;
  text="task=preview";
  text+="&comment="+encodeURIComponent(form.comment.value);
  text+="&markup="+encodeURIComponent(form.markup.value);
  if(thread) text+="&thread="+thread;

  let xmlhttp=get_xmlhttp();
  xmlhttp.open("POST",nameWithoutCollision);
  xmlhttp.onreadystatechange=function() {
    if(xmlhttp.readyState==4) preview.innerHTML=xmlhttp.responseText;
  }
  if(is_ie()||xmlhttp.setRequestHeader) xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
  xmlhttp.send(text);
}