// JavaScript Document

function show_hide(id){
  if (document.getElementById(id).style.display=="none"){
    Effect.BlindDown(id, { duration: 0.3 });
  }
  else{ 
    Effect.BlindUp(id, { duration: 0.3 });
  }
}

function hide_video(){
  if (document.getElementById('main_video')){
    document.getElementById('main_video').style.visibility='hidden';
    document.getElementById('main_video_container').style.backgroundColor='black';
  }
}
  
function show_video(){
  if (document.getElementById('main_video')){
    document.getElementById('main_video').style.visibility='visible';
    document.getElementById('main_video_container').style.backgroundColor=null;
  }
}