var currentSize;
/*
	*	Description:Functions used to create/delete a cookie
	*	Taken from http://www.webreference.com/js/column8/functions.html
/*
   name - name of the cookie
   value - value of the cookie
   [expires] - expiration date of the cookie
     (defaults to end of current session)
   [path] - path for which the cookie is valid
     (defaults to path of calling document)
   [domain] - domain for which the cookie is valid
     (defaults to domain of calling document)
   [secure] - Boolean value indicating if the cookie transmission requires
     a secure transmission
   * an argument defaults when it is assigned null as a placeholder
   * a null placeholder is not required for trailing omitted arguments
*/

function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

/*
  name - name of the desired cookie
  return string containing value of specified cookie or null
  if cookie does not exist
*/

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

/*
   name - name of the cookie
   [path] - path of the cookie (must be same as path used to create cookie)
   [domain] - domain of the cookie (must be same as domain used to
     create cookie)
   path and domain default if assigned null or omitted if no explicit
     argument proceeds
*/

function deleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"
function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}

function removeCookie(name, path, domain)
{
	deleteCookie(name, path,domain);
	window.location.href = window.location.href;
}


function smallestSize(){
	currentSize = 0;
	var now = new Date();
	fixDate(now);
	now.setTime(now.getTime() + 1 * 24 * 60 * 60 * 1000);
	setCookie("textSize", currentSize, now, "/");
	window.location.href = window.location.href;
}


function smallerSize(){
	currentSize = 1;
	var now = new Date();
	fixDate(now);
	now.setTime(now.getTime() + 1 * 24 * 60 * 60 * 1000);	
	setCookie("textSize", currentSize, now, "/");
	window.location.href = window.location.href;
}

function defaultSize(){
	currentSize = 2;
	var now = new Date();
	fixDate(now);
	now.setTime(now.getTime() + 1 * 24 * 60 * 60 * 1000);
	setCookie("textSize", currentSize, now, "/");
	window.location.href = window.location.href;
}

function largerSize(){
	currentSize = 3;
	var now = new Date();
	fixDate(now);
	now.setTime(now.getTime() + 1 * 24 * 60 * 60 * 1000);	
	setCookie("textSize", currentSize, now, "/");
	window.location.href = window.location.href;
}


function largestSize(){
	currentSize = 4;
	var now = new Date();
	fixDate(now);
	now.setTime(now.getTime() + 1 * 24 * 60 * 60 * 1000);
	setCookie("textSize", currentSize, now, "/");
	window.location.href = window.location.href;
}

// --- Change the text size for the page by choosing the correct stylesheet ---
function changeTextSize(backref){


	var fontSize = getCookie("textSize");
	//Set font to default if no cookie exists
	if (!fontSize) 
	{
		var htmlLine = "<link rel=\"stylesheet\" href=\"" +backref+ "includes/textSize/default.css\" type=\"text/css\">";
		document.write(htmlLine);
	}
	//Change the fontsize
	else
	{ 
		if (fontSize == 0) {
			var htmlLine = "<link rel=\"stylesheet\" href=\"" +backref+ "includes/textSize/smallest.css\" type=\"text/css\">";
			document.write(htmlLine);
		} else if (fontSize == 1) {
			var htmlLine = "<link rel=\"stylesheet\" href=\"" +backref+ "includes/textSize/smaller.css\" type=\"text/css\">";
			document.write(htmlLine);
		} else if (fontSize == 2) {
			var htmlLine = "<link rel=\"stylesheet\" href=\"" +backref+ "includes/textSize/default.css\" type=\"text/css\">";
			document.write(htmlLine);		
		} else if (fontSize == 3) {
			var htmlLine = "<link rel=\"stylesheet\" href=\"" +backref+ "includes/textSize/larger.css\" type=\"text/css\">";
			document.write(htmlLine);	
		} else if (fontSize == 4) {
			var htmlLine = "<link rel=\"stylesheet\" href=\"" +backref+ "includes/textSize/largest.css\" type=\"text/css\">";
			document.write(htmlLine);	
		} else {}

	} 
}