function getCookie(name){ 
  cookies = document.cookie.split('; '); 
  for (var i=0; i < cookies.length; i++) { 
    expr = cookies[i].split("="); 
    if (name == expr[0]) 
      return unescape(expr[1]); 
  } 
  return null; 
} 

function setCookie(name,value){ 
  document.cookie = name + '=' + escape(value) + '; expires=' + (d = new Date(3000,01)).toGMTString(); 
}