/*
 * Copyright (C) 2007 Université de Lausanne
 * Written by Etienne Dysli
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


function pad(key,text) {
  var result="";
  for(var i=0;i<key.length;i++) {
    result+=String.fromCharCode(key.charCodeAt(i) ^ text.charCodeAt(i));
  }
  return result;
}


function a(k1,t1,k2,t2) {
  var a=document.createElement("a");
  var t=document.createTextNode(pad(k2,t2));
  a.setAttribute("href",pad(k1,t1));
  a.appendChild(t);
  var pos=document;
  while(pos.lastChild.nodeType==1) {
    pos=pos.lastChild;
  }
  pos.parentNode.replaceChild(a,pos);
}