Undolog.com

/**
 * Restituisce il valore di un cookie
 *
 * @example
 *  var res = getCookie( 'variabile' );
 *
 */
function getCookie( 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)) );
}