程序代码：

// ==UserScript==
// @id             kk@scriptish
// @name           bccn.net回复kk
// @version        0.1
// @namespace      bccn.net@scriptish
// @include        https://bbs.bccn.net/*
// @run-at         document-end
// ==/UserScript==
(
 function ()
 {
  window.addEventListener("keypress", function (e)
     {
      if((e.charCode == 83 || e.charCode == 115) && e.altKey && !e.ctrlKey && !e.shiftKey)
      {
       //Alt+s
       //alert('aa');
       //var input = document.getElementById("Editor_Iframe").contentWindow.document.body.innerHTML;
       //alert(input);
       document.getElementById("Editor_Iframe").contentWindow.document.body.innerHTML = "kk";
       document.getElementById("St").click();
      }
     }, true);
 }
)();