var prefsLoaded = false;
var defaultFontSize =76;
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 * 5);

   if(currentFontSize > 220){
      currentFontSize = 220;
   }else if(currentFontSize < 60){
      currentFontSize = 60;
   }

   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);
}