var NS = (navigator.appName.indexOf("Netscape")!=-1);
    var MS = (navigator.appName.indexOf("Microsoft")!=-1);
    var VER=parseInt(navigator.appVersion);
    var CSS=((MS&&VER>=4)||(NS&&VER>=5));
    var NS4=(NS&&VER==4);
    var NS6=(NS&&VER==5);
    var IE4=(MS&&VER==4);
    var IE5=(MS&&VER==5);
    var ver4= (VER>=4&&(MS||NS));
    var ver5=((MS&&VER>=5)||(NS&&VER>=5));

    function expandEl1(el) {
      if ( !CSS ) return;
      if ( IE4 ) {
        whichEl = eval("b" + el);
      } else {
        whichEl = document.getElementById("b" + el);
      }
      if (whichEl ) {
        if ( whichEl.style.display != "block") {
          whichEl.style.display = "block";
        }
        else {
          whichEl.style.display = "none";
        }
      }
    }