var prefsLoaded = false;
var defaultFontSize = '75';
var currentFontSize = defaultFontSize;

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

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

function changeFontSize(sizeDifference)
{
        if(!sizeDifference) {
                setFontSize('');
                return;
        }
        if(!currentFontSize) {
                currentFontSize = defaultFontSize;
        }
        currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);

        if(currentFontSize > 100) {
                currentFontSize = 100;
        }else if(currentFontSize < 60) {
                currentFontSize = 60;
        }

        setFontSize(currentFontSize);
}

function setFontSize(fontSize)
{
        if(fontSize == defaultFontSize) fontSize = '';
        var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
        if(fontSize) document.body.style.fontSize = fontSize + '%';
        else document.body.style.fontSize = '';
        currentFontSize = 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;
}

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

window.onunload = saveSettings;
function saveSettings()
{
  createCookie("fontSize", currentFontSize, 365);
}