function openPlayer(fileName){
winAttributes='scrollbars=0,resizable=1, status=0, width=525,height=200';
window.open(fileName, '', winAttributes);
}


function switchMenu(obj) {
  var el = document.getElementById(obj);
  if ( el.style.display != "none" ) {
    el.style.display = 'none';
  }
  else {
    el.style.display = '';
  }
}