/*
function fontsizeup()
{
  active = getActiveStyleSheet();

  switch (active)
  {
    case 'A' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A++');
      break;
    case 'A++' :
      break;
    default :
      setActiveStyleSheet('A');
      break;
  }
}

function fontsizedown()
{
  active = getActiveStyleSheet();

  switch (active)
  {
    case 'A++' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
       break;
    default :
      setActiveStyleSheet('A');
      break;
  }
}
*/

function setActiveStyleSheet(title)
{
  var i, a, main;
  
  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()
{
  return ('A');
}

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=/";
}

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;
}

window.onload = function(e)
{
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();

  if (title == 'null')
  {
    title = getPreferredStyleSheet();
  }

  setActiveStyleSheet(title);
}

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

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

if (title == 'null')
{
  title = getPreferredStyleSheet();
}

setActiveStyleSheet(title);