var prefsLoaded = false;
var defaultFontSize = 76;
var currentFontSize = defaultFontSize;

function openWindow(pic){
  newWindow = window.open(pic, 'newWin', 'width=400,height=600')
  newWindow.focus()
}

function closeWindow(){
  if(newWindow && !newWindow.closed){
    newWindow.close()
  }
}

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 > 100){
    currentFontSize = 100;
  }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);
}