var prefsLoaded=false;
var defaultFontSize=64;
var currentFontSize=defaultFontSize;

function revertStyles()
{
   currentFontSize=defaultFontSize;
   changeFontSize(0);
}

function toggleColors()
{
   if(currentStyle=="White")
      setColor("Black");
   else
      setColor("White");
}

function changeFontSize(sizeDifference)
{
   currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 6);

   if(currentFontSize > 80) currentFontSize=80;
   else if(currentFontSize < 50) currentFontSize=50;
   setFontSize(currentFontSize);
}

function setFontSize(fontSize)
{
   var stObj=(document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
   document.body.style.fontSize=fontSize + '%';
//alert (document.body.style.fontSize);
}


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 = setUserOptions;

function setUserOptions()
{
   if(!prefsLoaded){
      cookie=readCookie("fontSize");
      currentFontSize=cookie ? cookie : defaultFontSize;
      setFontSize(currentFontSize);
      prefsLoaded=true;
   }
}

window.onunload = saveSettings;

function saveSettings()
{
  createCookie("fontSize",currentFontSize,365);
}