function WriteCookie(nom, valeur)
{
  var argv=WriteCookie.arguments;
  var argc=WriteCookie.arguments.length;
  var expires=(argc > 2) ? argv[2] : null;
  var path=(argc > 3) ? argv[3] : null;
  var domain=(argc > 4) ? argv[4] : null;
  var secure=(argc > 5) ? argv[5] : false;
  
  document.cookie = nom + "=" + escape(valeur)+
  ((expires==null) ? "" : ("; expires="+expires.toGMTString()))+
  ((path==null) ? "" : ("; path="+path))+
  ((domain==null) ? "" : ("; domain="+domain))+
  ((secure==true) ? "; secure" : "");
}

function getCookieVal(offset)
{
  var endstr = document.cookie.indexOf (";", offset);
  
  if (endstr==-1) 
    endstr=document.cookie.length;
    
  return unescape(document.cookie.substring(offset, endstr)); 
}

function ReadCookie(nom)
{
  var arg=nom+"=";
  var alen=arg.length;
  var clen=document.cookie.length;
  var i=0;
  
  while (i<clen)
  {
    var j=i+alen;
    if (document.cookie.substring(i, j)==arg) 
      return getCookieVal(j);
      
    i=document.cookie.indexOf(" ",i)+1;
    
    if (i==0) 
      break;
  }
  return null; 
}