//dynamically swap in a different stylesheet
  // - can only handle single stylesheet swapping


  //..... ..... ..... .....

  function _setStyleSheet()
  {
    var _s=_getCookie("sCSS");

    if (_s=="" || _s.length==0) {_s="graphic";};  //default to _graphic.css

    var _tag=document.getElementById("setCSS");

    _tag.href="_css/_"+_s+".css";
      //this method tested only at IE6, Mozilla1.8, Opera 7.23; 
      //and anyway, I thought this property was supposed to be readonly?

    return;
  };

  function _changeStyleSheet(_v)
  {
    _setCookie("sCSS", _v);
    _setStyleSheet(); //from the cookie
  };

  //..... ..... ..... .....//