function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = '; expires='+date.toGMTString();
  }
  else expires = '';
  document.cookie = name+'='+value+expires+'; path=/~mishoo';
}

function readCookie(name) {
  var nameEQ = name + '=';
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

function setPreference(index, val) {
  var cookie = readCookie('site-prefs');
  var prefs = null;
  if (cookie) {
    prefs = cookie.split('|');
  } else {
    prefs = new Array('dark', 'left', '14');
  }
  prefs[index] = val;
  cookie = prefs.join('|');
  createCookie('site-prefs', cookie, 30);
}

function setStyle(title)
{
  setPreference(0, title);
  setActiveStyleSheet(title);
}

function setMenuPos(pos)
{
  setPreference(1, pos);
}

function setDocFontSize(size) {
  var body = document.getElementsByTagName("body")[0];
  body.style.fontSize = size + "px";
  setPreference(2, size);
}

function setActiveStyleSheet(title) {
  var i, a, main;
  if (title) {
    for(i=0; (a = document.getElementsByTagName('link')[i]); i++) {
      if(a.getAttribute('rel').indexOf('style') != -1 && a.getAttribute('title')) {
        a.disabled = true;
        if(a.getAttribute('title') == title) a.disabled = false;
      }
    }
  }
}

/*

function getActiveStyleSheet() {
    var i, a;
    for(i=0; (a = document.getElementsByTagName('link')[i]); i++) {
      if   ( a.getAttribute('rel').indexOf('style') != -1 &&
             a.getAttribute('title') && !a.disabled )
          return a.getAttribute('title');
    }
    return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName('link')[i]); i++) {
    if(a.getAttribute('rel').indexOf('style') != -1
       && a.getAttribute('rel').indexOf('alt') == -1
       && a.getAttribute('title')
       )
       return a.getAttribute('title');
  }
  return null;
}

*/


/*

window.onload = function(e) {
  var cookie = readCookie('site-prefs');
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
  var cookie2 = readCookie('mishoo-size');
  if (cookie2) {setFontSize(cookie2);}
}

//    var cookie = readCookie('site-prefs');
//    var title = cookie ? cookie : getPreferredStyleSheet();
//    setActiveStyleSheet(title);
//    var cookie2 = readCookie('mishoo-size');
//    if (cookie2) {setFontSize(cookie2);}

*/