// cookies.js

var expireDate = new Date();
expireDate.setMonth(expireDate.getMonth()+2);

function getCookieVal (offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1) { endstr = document.cookie.length; }
	return unescape(document.cookie.substring(offset, endstr));
	}

function GetCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg) {
			return getCookieVal (j);
			}
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break; 
		}
	return null;
	}

function DeleteCookie (name,path,domain) {


	if (GetCookie(name)) {
		document.cookie = name + "=" +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		"; expires="+expireDate.toGMTString();
		}
	}

function SetCookie (name,value,expires,path,domain,secure) {
  document.cookie = name + "=" + escape (value) +
    ((expires) ? "; expires=" + expireDate.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
	}
	
//
// end of cookie.js
//

var THEME_KEY = "theme";	// this key is used to store the selected theme.
var THEMES_FOLDER_PATH = "css/";
var DEFAULT_THEME = "default";

function insertStyleSheet() {
	var s = GetCookie(THEME_KEY);
	if (s == null) s = DEFAULT_THEME;
	document.writeln('<link href="'+THEMES_FOLDER_PATH+s+'.css" type="text/css" rel="stylesheet">');
}

function setTheme(name) {

	DeleteCookie(THEME_KEY);					
	SetCookie(THEME_KEY, name);
	self.location = self.location;	// simple trick to reload the current document
}
	
insertStyleSheet();