function setActiveStyleSheet(title) {
  var i, a, main;
  for (i = 0; ( a = document.getElementsByTagName("link")[i] ); i++) {
    if ( a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") ) {
      a.disabled = true;
      if ( a.getAttribute("title") == title ) a.disabled = false;
    }
  }
}

function showHide(obj) {
   document.getElementById(obj).style.display = (document.getElementById(obj).style.display == 'none') ? "block":"none";
}