var Cookie = {
   
   /***
    Thank you Dustin Diaz for these cookie functions
    ***/
   getCookie: function(name){
      var start = document.cookie.indexOf(name + "=");
      var len = start + name.length + 1;
      if ((!start) && (name != document.cookie.substring(0, name.length))) {
         return null;
      }
      if (start == -1) 
         return null;
      var end = document.cookie.indexOf(';', len);
      if (end == -1) 
         end = document.cookie.length;
      return unescape(document.cookie.substring(len, end));
   },
   
   setCookie: function(name, value, expires, path, domain, secure){
   
      var today = new Date();
      today.setTime(today.getTime());
      if (expires) {
         expires = expires * 1000 * 60 * 60 * 24;
      }
      var expires_date = new Date(today.getTime() + (expires));
      document.cookie = name + '=' + escape(value) +
      ((expires) ? ';expires=' + expires_date.toGMTString() : '') + //expires.toGMTString()
      ((path) ? ';path=' + path : '') +
      ((domain) ? ';domain=' + domain : '') +
      ((secure) ? ';secure' : '');
   },
   
   deleteCookie: function(name, path, domain){
      if (Cookie.getCookie(name)) 
         document.cookie = name + '=' +
         ((path) ? ';path=' + path : '') +
         ((domain) ? ';domain=' + domain : '') +
         ';expires=Thu, 01-Jan-1970 00:00:01 GMT';
   }
}
      
/**
*
* Base64 encode / decode
* http://www.webtoolkit.info/
*
**/
var Base64 = {

   // private property
   _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
   
   // public method for encoding
   encode: function(input){
      var output = "";
      var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
      var i = 0;
      
      input = Base64._utf8_encode(input);
      
      while (i < input.length) {
      
         chr1 = input.charCodeAt(i++);
         chr2 = input.charCodeAt(i++);
         chr3 = input.charCodeAt(i++);
         
         enc1 = chr1 >> 2;
         enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
         enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
         enc4 = chr3 & 63;
         
         if (isNaN(chr2)) {
            enc3 = enc4 = 64;
         }
         else 
            if (isNaN(chr3)) {
               enc4 = 64;
            }
         
         output = output +
         this._keyStr.charAt(enc1) +
         this._keyStr.charAt(enc2) +
         this._keyStr.charAt(enc3) +
         this._keyStr.charAt(enc4);
         
      }
      
      return output;
   },
   
   // public method for decoding
   decode: function(input){
      var output = "";
      var chr1, chr2, chr3;
      var enc1, enc2, enc3, enc4;
      var i = 0;
      
      input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
      
      while (i < input.length) {
      
         enc1 = this._keyStr.indexOf(input.charAt(i++));
         enc2 = this._keyStr.indexOf(input.charAt(i++));
         enc3 = this._keyStr.indexOf(input.charAt(i++));
         enc4 = this._keyStr.indexOf(input.charAt(i++));
         
         chr1 = (enc1 << 2) | (enc2 >> 4);
         chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
         chr3 = ((enc3 & 3) << 6) | enc4;
         
         output = output + String.fromCharCode(chr1);
         
         if (enc3 != 64) {
            output = output + String.fromCharCode(chr2);
         }
         if (enc4 != 64) {
            output = output + String.fromCharCode(chr3);
         }
         
      }
      
      output = Base64._utf8_decode(output);
      
      return output;
      
   },
   
   // private method for UTF-8 encoding
   _utf8_encode: function(string){
      string = string.replace(/\r\n/g, "\n");
      var utftext = "";
      
      for (var n = 0; n < string.length; n++) {
      
         var c = string.charCodeAt(n);
         
         if (c < 128) {
            utftext += String.fromCharCode(c);
         }
         else 
            if ((c > 127) && (c < 2048)) {
               utftext += String.fromCharCode((c >> 6) | 192);
               utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
               utftext += String.fromCharCode((c >> 12) | 224);
               utftext += String.fromCharCode(((c >> 6) & 63) | 128);
               utftext += String.fromCharCode((c & 63) | 128);
            }
         
      }
      
      return utftext;
   },
   
   // private method for UTF-8 decoding
   _utf8_decode: function(utftext){
      var string = "";
      var i = 0;
      var c = c1 = c2 = 0;
      
      while (i < utftext.length) {
      
         c = utftext.charCodeAt(i);
         
         if (c < 128) {
            string += String.fromCharCode(c);
            i++;
         }
         else 
            if ((c > 191) && (c < 224)) {
               c2 = utftext.charCodeAt(i + 1);
               string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
               i += 2;
            }
            else {
               c2 = utftext.charCodeAt(i + 1);
               c3 = utftext.charCodeAt(i + 2);
               string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
               i += 3;
            }
         
      }
      
      return string;
   }
}