var saveFontSize = 0;

function setActiveStyleSheet(title)
{
  var i, a;
  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;
      }
    }
  }
  setDefaultFontSize(title);
}

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;
}

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

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 setDefaultFontSize(title)
{
  var fSize = 100;
  if (title == "1")
  {
    fSize = 90;
  }
  else if (title == "2")
  {
    fSize = 95;
  }
  else if (title == "3")
  {
    fSize = 80;
  }
  else if (title == "4")
  {
    fSize = 70;
  }
  else if (title == "5")
  {
    fSize = 100;
  }
  else if (title == "print")
  {
    fSize = 100;
  }
  initFont(fSize);
}

window.onload = function(e)
{
  loadTime();
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  saveFontSize = parseInt(readCookie("fontsize"));
  setActiveStyleSheet(title);
  if (saveFontSize>0)
  {
    bodySize = saveFontSize;
    setFontSize(saveFontSize);
  }
}

window.onunload = function(e)
{
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
  createCookie("fontsize", bodySize, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);