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

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

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