function getCookie(name)
{
  search=name+"=";
  len=search.length;
  cookielen=document.cookie.length;
  pos=0;
  while (pos<cookielen)
  {
    end=pos+len;
    if (document.cookie.substring(pos,end)==search)        
    {
      endstr=document.cookie.indexOf(";",end);   
      if (endstr==-1)      
        endstr=document.cookie.length;   
      return unescape(document.cookie.substring(end,endstr));
    }
    pos=document.cookie.indexOf(" ",pos)+1;
    if (pos==0) break;
  }
  return null;
}

function setCookie(name,value,days)
{
  expiry=new Date();
  expiry.setTime(expiry.getTime()+(86400000*days));
  document.cookie=name+"="+escape(value)+"; expires="+expiry.toGMTString();
}