var newWorldsJS = {
   /**
    * Sets a Cookie with the given name and value.
    *
    * name       Name of the cookie
    * value      Value of the cookie
    * [expires]  Expiration date of the cookie (default: end of current session)
    * [path]     Path where the cookie is valid (default: path of calling document)
    * [domain]   Domain where the cookie is valid
    *              (default: domain of calling document)
    * [secure]   Boolean value indicating if the cookie transmission requires a
    *              secure transmission
    */
   setCookie : function(name, value, expires, path, domain, secure) {
       document.cookie= name + "=" + escape(value) +
           ((expires) ? "; expires=" + expires.toGMTString() : "") +
           ((path) ? "; path=" + path : "") +
           ((domain) ? "; domain=" + domain : "") +
           ((secure) ? "; secure" : "");
   },
   /**
    * Gets the value of the specified cookie.
    *
    * name  Name of the desired cookie.
    *
    * Returns a string containing value of specified cookie,
    *   or null if cookie does not exist.
    */
   getCookie : function(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));
   },
   /**
    * Make a specific stylehseet the active stylesheet
    *
    * [title] title of style sheet to be made active, if not supplied will try to read from cookie
    */
   setActiveStyleSheet : function(title) {
      var i, a, main;
      var nwCookie = "newWorldsCSS";
      // If no title is supplied, get it from cookie
      // Allows this function to be called on page load and onclick
      if (typeof title == "undefined" || typeof title == "object") {
         title = newWorldsJS.getCookie(nwCookie);
         if (title == null) {
            title = "purple"; // default style sheet title
         }
      }
      for (i = 0; a = document.getElementsByTagName("link")[i]; i++) {
         if (a.getAttribute("rel").indexOf("style") != -1 &&
            a.getAttribute("title")) {
            a.disabled = true;
            if (a.getAttribute("title") == title) {
               a.disabled = false;
               var date = new Date();
                         date.setTime(date.getTime()+(365*24*60*60*1000));
               newWorldsJS.setCookie(nwCookie, title, date, "/");
            }
         }
      }
   }
}