var prefsLoaded = false;
var defaultFontSize = 76;
var currentFontSize = defaultFontSize;
var currentStyle = "White";

function revertStyles(){

	currentFontSize = defaultFontSize;
	changeFontSize(0);
	
	currentStyle = "White";
	setColor("White");

}

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

function setColor(color){
	d=new Date();
	flash=Math.round(Math.random()*d.getTime());
	if(color != "White"){
		document.body.className = 'dark';
		currentStyle = "Black";
	}else{
		document.body.className = '';
		currentStyle = "White";
	}
}

function changeFontSize(sizeDifference){
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);

	if(currentFontSize > 90){
		currentFontSize = 90;
	}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);
		
		cookie = readCookie("pageColor");
		currentStyle = cookie ? cookie : "White";
		setColor(currentStyle);
		prefsLoaded = true;
	}

}

window.onunload = saveSettings;

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