function returnObjById( id )
{
    if (document.getElementById)
        var returnVar = document.getElementById(id);
    else if (document.all)
        var returnVar = document.all[id];
    else if (document.layers)
        var returnVar = document.layers[id];
    return returnVar;
}

function OpenMenu(NAME){
  if(returnObjById(NAME).style.display == 'none'){
    returnObjById(NAME).style.display = ''
  }else{
    returnObjById(NAME).style.display = 'none'
  }
}