var brwCheck = false;



if ((document.all && document.selection) ||
    (navigator.product && navigator.product == "Gecko") ||
    (window.opera && document.createEvent)) {
  brwCheck = true;
  document.write("<style type='text/css'> .none { display:block;} <\/style>");
}

function clickMenu(idName, spanObj) {
  if (brwCheck) {
    with (document.all ? document.all(idName).style : document.getElementById(idName).style) {
      if (display == "block") {
        display = "none";
        //spanObj.innerHTML = "��";
      } else {
        display = "block";
        //spanObj.innerHTML = "��";
      }
    }
  }
}